Theater auditorium lighting solutions

Overview of theater auditorium stage lighting project

Take a newly built grand theater or auditorium stage as an example, equipped with a complete stage lighting system. The theater and auditorium stages are indoor performance venues with large-scale ethnic song and dance performances as the main performance form. The internal main stage is 28 meters wide (the proscenium width is 22 meters), the stage depth is 18 meters, and the stage proscenium height is 9 meters. It can accommodate more than a hundred actors performing large-scale ethnic songs and dances on the same stage, and can also meet other purposes such as popular music concerts, variety show evenings, dramas, dance dramas, conferences, movies, etc. The functional requirements of the theater auditorium stage lighting system are to meet the needs of various comprehensive performance activities, and to ensure the lighting requirements for large and medium-sized conferences and the broadcast and recording of live performances on television. We design the overall stage lighting scheme based on this functional positioning. Therefore, the program design should reflect performance-oriented and people-oriented design ideas. When designing stage lighting, we fully consider the professional cooperation between lighting, stage machinery and other related equipment to technically ensure that the theater auditorium becomes a first-class performance venue in the country. As a newly built theater auditorium stage, the lighting circuit design highlights the advanced awareness of construction and fully considers the number of stage lighting circuits to meet the performing arts’ flexible requirements for stage lighting. The equipment configuration is as much as possible to meet the needs of large and medium-sized theatrical performances. Mainly to take into account the needs of other forms of performances. On the premise of ensuring practicality, we pursue economy, advancement, security and scalability.
The overall stage lighting system design, configuration and layout of the theater auditorium meets the requirements of various theatrical performances. The lighting of the entire stage must be scientific, reasonable and harmonious. The stage lighting layout is divided into the inner and outer areas of the stage. It is equipped with basic lighting points and can be flexibly adjusted to meet the needs of performances and other functional purposes. In order to meet the above performance functions, the stage lighting system design plan must achieve:
① The stage lighting system must be advanced and practical; ② The stage lighting circuit design should highlight the advanced awareness of construction and fully consider the number of stage lighting circuits to meet the flexible and changeable requirements of modern art for stage lighting; ③ The system uses network technology and has sufficient room for expansion, and ensure safe and stable operation; ④ The design of the stage lighting system must meet the requirements for convenient management of performances;

Theater auditorium stage lighting design analysis and explanation

1. Design basis
l According to Party A’s needs and information provided
JG/J-57-2000/J67-2001 “Architectural Design Code for Theater Auditoriums”
JG/J16-2008 “Design Code for Electrical Appliances in Civil Buildings”
GB/J16-92 “Code for Fire Protection Design of Buildings”
GB/T50314-2000 “Intelligent Building Design Standards”
GB/T50311-2000 “Design Code for Integrated Wiring Engineering of Buildings and Building Groups”
GB/T50312-2000 “Code for Acceptance of Integrated Wiring System Engineering for Buildings and Building Groups”
GB/50259-96 “Code for Construction and Acceptance of Electrical Lighting Devices in Electrical Installation Engineering”
GB/50169-92 “Code for Construction Quality Acceptance of Grounding Devices in Electrical Installation Projects”
GB/J232 “Code for construction and acceptance of electrical installation installation projects”
GB/50300 “Unified Standard for Construction Quality Acceptance of Construction Projects”
GB/50303 “Code for Construction Quality Acceptance of Building Electrical Installation Projects”
GB/50057 “Lightning Protection Design Code for Buildings”
GB/T14549/93 Power quality, public grid harmonics
GB/T126661/6/90 Flame resistance assessment standard for cables
GB/50217/94 Cable design specifications
GB/50258/96 Cable laying specifications
GB/T15734-1995 “Radio disturbance characteristics limits and measurement methods of electronic dimming equipment”
GB/T7002-86 “Photometric Test of Project Lighting Lamps”
GB7000.14-2000 “Safety Requirements for Ventilated Lamps”
GB7000.15-2000 “Safety Requirements for Lamps for Stage Lighting, Television, Film and Photography Locations (Indoor and Outdoor)”

2. Analysis of theater auditorium stage lighting design
The engineering design of stage lighting must meet the three aspects of light area control, light color control, and light quantity control. The organic combination of the three is a prerequisite for producing stage light with performance aesthetic value in the performance space.
Light zone control: The control of the performance lighting area. Its purpose is to use light to control the audience’s attention and guide the audience to watch the performance objects purposefully. And create variable performance space according to plot needs.
Light color control: The purpose of controlling light color display is to create a color and light atmosphere based on people’s physiological and psychological characteristics and associations with life, so that the audience can gain a visual experience of color.
Light quantity control: The purpose of controlling changes in light intensity is to use the intensity changes of light to adjust the artistic effects of light, to better obtain spatial light and dark effects in terms of changing the sense of time and space, cutting plot paragraphs, etc.
The design solutions are high quality, advanced, flexible and multi-faceted. When designing the system, we actively responded to the bidding documents, selected imported products for the main equipment, and the performance indicators of the products met the technical requirements of each professional system in the bidding documents, and fully applied the latest research results and results of networking, intelligence, and modularization. design concept. And follow the following design principles:
2.1. The advanced and scientific nature of the complete system
According to the theater auditorium stage lighting system that can meet the requirements of singing and dancing and other theatrical performances, the corresponding lighting system configuration requirements are: advanced technology, scientific system, stable and reliable, powerful functions, easy to use, and easy to maintain.
Advancement – Many advanced technologies are used in the design plan: ① professional stage lighting; ② stage lighting console with powerful control and programming functions; ③ intelligent dimming/pass-through cabinet;
Scientificity – taking advantage of the characteristics of high network transmission rate and strong scalability, as well as the fact that most current equipment generally adopts DMX512 signal control, scientifically integrates multiple signal transmission methods into a unified mixed signal transmission network , which makes the theater auditorium stage lighting system have good development potential and openness to adapt to the needs of high-speed and effective signal transmission, system expansion and continuous technological upgrading.
2.2. Completeness
Integrity is fully reflected in the realization of lighting system functions, the configuration of lighting equipment, the interconnection of different equipment, and the compatibility of signal transmission formats.
The lighting configuration of the theater auditorium stage fully considers the following aspects: ① lamps with good color rendering; ② high color temperature lamps; ③ effect lamps; ④ other intelligent stage lighting control equipment.
The configuration of the stage lighting control system fully considers the following aspects: ① Suitable for high-power, low-power, fixed and mobile dimming loops; ② Supports DMX512 communication interface; ③ Single dimming loop, dimming stand cabinet, Multi-level overcurrent/short circuit protection measures for the total lighting control system.
2.3. Upgradability
To design a complete lighting system configuration and stable operation design plan, in addition to having a very good lighting configuration, you should also consider the multiple compatibility and extended functions of the selected equipment. Due to the continuous development of technology and the endless emergence of new equipment, the design and installation of each project cannot always be the most advanced and perfect. However, in our design, we have fully considered the update and upgrade requirements of the later system.
2.4. Safety and reliability
Safety is an eternal topic. It is the most basic guarantee required by professional lighting systems for performance stages. The main equipment of the system provided conforms to national standards and reaches IS9001 international quality certification. System design, wire selection, and supporting construction comply with relevant national industry standards or specifications. The dimming console equipment is the control throat of the lighting system. Its own stability and the reliability of the dimming control system will directly affect the normal operation and performance of the entire system. Therefore, configuring stable and reliable dimming equipment is a prerequisite that must be considered.
2.5. Universality of equipment
Versatility of the system: The control signal of the theater auditorium lighting control system: DMX512, most of the world’s digital consoles, dimming cabinets, computer moving head lights, color changers and other digital devices can be stably used in the theater auditorium lighting system network run on. The dimming drawer and the pass-through drawer are interchangeable, which improves the versatility of the device and is suitable for the needs of different lamp types in various occasions.
2.6. Standardization of equipment and accessories
The connectors and wires are selected to ensure safety, reliability and durability, comply with the quality standards of the National Class A Theater, and meet or exceed the corresponding international or national electrical and related standards. Choose a supplier that has at least passed international certification (CEE, ISO9000, etc.). The wire should have the characteristics of flame retardancy, high softness, light specific gravity, and good overall performance.

3. Instructions for theater auditorium stage lighting layout
3.1. System composition
The stage lighting system mainly consists of digital dimming system, stage lighting and effect equipment. The digital dimming system consists of two parts: dimming equipment and transmission network; stage lighting and effect equipment involve the distribution of lamp positions, the selection and quantity of lamps.
3.2. Stage lighting circuit distribution
The design of the stage lighting circuit is the focus of a theater stage lighting design, because good design can provide lighting creators with space for artistic creation and technical support for flexible light use during performances. In other words, lighting circuits must be designed at all possible lighting locations in the theater, and these circuits must be distributed reasonably and scientifically. The distribution of theater stage lighting fixtures adopts the frame-type stage lighting design model. Technical performance requires the ability to light the entire stage area or multiple actors in the same performance area at the same time. The brightness and color of the light can be flexibly changed. The lighting arrangement can achieve a satisfactory lighting angle for any area. Achieve multi-directional and multi-angle lighting, providing necessary technical conditions for creating ideal artistic effects.
3.3. Surface light configuration instructions
As the main front light of the performance area, the surface light is mainly used to illuminate the performance area in front of the stage. It plays a role in front lighting for the performers on the stage, for character modeling or to make the objects on the stage present a three-dimensional effect.
In this design plan, remote imaging lights, cold light film and television spotlights, and cold light film and television return lights are used to arrange the light according to the projection distance to ensure that the surface light projection effect is achieved, the light spot is uniform, and the illumination is consistent.
Arrangement and projection method of lamps:
Vertical projection: achieve a uniform effect under the stage performance area;
Cross projection: Enhance the brightness of the center area and depth of the stage;
Key projection: Enhance the lighting of local stage performance areas.
3.4. Slap configuration instructions
The lights projected onto the stage from the slap rooms on both sides of the theater auditorium are used as modeling light in the diagonal direction in front of the stage to enhance the three-dimensional sense of the characters and scenery and form a lighting effect on the front side. The projection angle of the slap is lower than that of the surface light, and the projection distance is closer than that of the surface light. The lighting requirements are similar to those of the surface light. The projected beam cannot overflow beyond the stage mouth.
In this design plan, cold light film and television spotlights and cold light film and television backlights are used.
Arrangement and projection method of lamps:
Slap is the auxiliary light for face light and is used for character modeling;
The color atmosphere of the stage can be rendered from one or both sides;
The outer light and the inner light are cross-projected to obtain a larger light projection range;
When two or more rows of lights with the same light color are projected at the same time, the light with a higher position usually projects the high beam area, and the light with a lower position usually projects the low beam area.
3.5. Side light configuration instructions
The function of side light is to create a sense of direction of the light source from the side of the stage, creating a sense of hierarchy and three-dimensionality for the actors in the starring area. It can be used as auxiliary lighting to illuminate the actor’s face, and can enhance the level of the scene to render the characters and the stage space environment. Factors such as the angle, direction, distance of the light, type of lamp, power, etc. will all cause various side lighting effects.
Considering that on this large stage, the longest irradiation distance of the side light is no less than that of the surface light, cold light film and television backlights and flat convex spotlights are used in this design plan.
Side light direction: There are three lighting cages on each side of the main stage.
Arrangement and projection method of lamps:
The shooting distance of the side light is from near to far, and the light projection angle is from near to far. There are many changes. The modeling light from one side or both sides can emphasize and highlight the outline of the side, which is suitable for expressing reliefs, figures and other volumetric objects. Effect. Unilateral light can show a strong contrast between yin and yang. Bilateral light can express splint light with personalized characteristics, but the light ratio of the front auxiliary light and the side light needs to be adjusted to obtain a more complete modeling effect.
3.6. Column light configuration instructions
The cylindrical lights set up on both sides of the stage curtain line are column lights, and the light is emitted from both sides of the stage to the performance area; it is mainly used to make up for the lack of face light and slap, and can also be used as the main light in the middle and back performance areas. need. In this design plan, flat convex spotlights are used. The arrangement and projection method of lamps and lanterns: slaps are basically the same.
3.7. Toplight and backlight configuration instructions
The top light is set up above the stage every 2M-2.5M or so. The power supply hangs down from the stage ceiling through multi-core cables. There are cable baskets on both sides of the light boom, and the lamps are hung under the light boom. Its function is to provide necessary lighting for the deep performance space of the stage. The top light includes forward light and backlight, which can be overlapped on the same light pole. The lamps can be configured according to the needs of the performance.
In this design plan, cold light film and television soft light, cold light film and television return light, and 1.2KW moving head computer light are used.
Arrangement and projection method of lamps:
The first top light connects with the surface light to illuminate the starring area. Pay attention to the height of the characters when connecting. You can use the first top light position as a fixed point light and select some lamps to enhance the lighting of the fulcrum of the performance area; the second to seventh lights According to the needs of the plot, the path can be projected directly behind the stage, vertically downward, or forward as a backlight; thereby enhancing the lighting of the stage characters and scenery space. The front and rear lights are connected to achieve relatively uniform color and brightness in the stage performance area.
3.8. Sky row light configuration instructions
Contrary to the ground row lights, the sky row lights use diffused projection lamps from top to bottom to project light and render colors to the upper part of the stage canopy. They are usually used in conjunction with the floor row lights to make the color changes richer. The lamps are used in combination with single lamps. This design plan uses sky row lights.
Lamp arrangement and projection method: Rows of lamps are evenly placed in front of the stage canopy to project the sky canopy to express the horizon, horizontal lines, sunset, etc. They are usually used in conjunction with floor lamps to make the light color changes richer.
3.9. Ground lighting configuration instructions
Contrary to the sky row lights, the floor row lights are diffused projection lamps that project light and render colors to the lower part of the stage canopy from bottom to top. They are usually used in conjunction with the sky row lights to make the color changes richer. Use single lamp combination. This design uses ground row lights. Installed on the front panel of the canopy, 2.8m-3.5m away from the canopy.
Lamp arrangement and projection method: Rows of lamps are evenly placed in front of the stage canopy, used to illuminate the canopy upward to express the horizon, horizontal lines, sunset, etc. They are usually used in conjunction with sky row lights to make the light color changes richer.
3.10. Follow spotlight configuration instructions
Lamps designed based on the principles of optical imaging and zoom have functions such as changing the size, color, light and shade, virtual reality, etc. of the aperture. During the performance, they are installed on a special bracket to follow the movement of the actors and at the same time enhance the lighting brightness to increase the audience’s attention. It can be set up in various positions in the performance theater space to achieve partial lighting effects on the actor’s half body, whole body, long distance and small range. Sometimes, light chasing can also be used to express abstract and illusory stage plots.
Follow-spot light configuration: 2.5KW remote and efficient follow-spot light.
3.11. Computer light configuration instructions
Intelligent lamps are the inevitable development trend of stage lighting in the 21st century. In order to meet various performance lighting needs, 1.2KW moving head pattern computer lights and 1.2KW moving head (CMY three primary colors) dyeing computer lights are configured.
Dimming configuration of the auditorium hall lights: The auditorium lighting has a gradual change function, and 4 units (6-way dimming silicon boxes) are selected. Computer console is used for linear remote control (lighting control room, stage supervisor).
The integrated design of intelligent digital computer lights has higher stability than the previous mechanized lights composed of electric mechanical frame + spotlight + color changer + shading plate + special effect color wheel. The CMY color mixing system in the computer light can adjust more than 10,000 colors, which is unmatched by ordinary color changers; various graphics and even slides can be projected using replaceable gobos; two or more gobos overlap It can create ever-changing dynamic images; pattern-type computer lights can also use animation wheels to create movable water shadows, clouds, fire, rocks and other special effects. The remote-controlled sunshade can modify the shape of the light beam so that the light spot is projected onto different sets and props according to the lighting designer’s specifications. The same lamp can quickly change settings to illuminate different objects. Computer lights have excellent functions and can greatly reduce the number of effect lamps on the stage. The computer lights are mainly arranged on the top light pole above the stage. They use DMX signals to connect to the computer console. The projection angle, brightness, changing pattern, beam size, color and other functions of the lamp can be adjusted arbitrarily, which can fully meet the needs of digital performances in various performances. Change requirements for computer lights.
3.13. Other effect configuration instructions
In order to better express the performance effect, a digital smoke machine, a snowflake machine, a large two-wheel bubble machine, a strobe light and four audience lights were set up on the stage to simulate real scenes in nature.

4. Theater auditorium stage lighting control system
The network digital dimming system includes dimming control equipment and a control network. The dimming control equipment controls dimming silicon cabinets, conventional lamps, effect lamps and other equipment through the control network. The transmission speed, capacity and quality of the control network determine Whether the entire lighting control system can work stably, reliably and with high quality, therefore the control network should be the core of the entire lighting system. In the scheme we designed, the control network adopts the commonly used method in newly built theaters at home and abroad.Use the relatively mature Ethernet (Ethernet network). The biggest features of Ethernet are: high speed, large capacity, good stability, and signals can be transmitted in both directions. The biggest advantage of bidirectional signal transmission is that the lighting control becomes very flexible. As long as a dimming and other control device is connected to any Ethernet socket, the entire lighting system can be controlled. This is suitable for large-scale performances or pre-performance rehearsals for lighting and other equipment. It is very convenient and practical for on-site control, and the control of stage lighting is not limited to the lighting control room.
4.1. Control network
(1) The basic principle of lighting network control and lighting control and transmission protocol. The basic principle of lighting network control is to package and map lighting control signals (such as DMX512 signals) from DMX terminal equipment into standard Ethernet signals on a faster Ethernet network. transmission, and finally unpacked into DMX signals to achieve lighting control. Of course, many lighting control equipment manufacturers have produced consoles that can directly output standard Ethernet signals, which can reduce a packaging link.
Transmission between network devices is achieved through “packets”, and any device (node) on the network can accept or send this “packet”. Simply put, a “package” can contain a data type, such as a DMX512 signal or console display information, which is identified by an address tag (the information type on the front end of the tag). Ethernet nodes monitor these packets on the network, and they only accept “packets” that have an explicit address.
At present, lighting equipment manufacturers have all followed the DMX512 communication standard, but have not yet agreed on a common Ethernet lighting control protocol. The two more commonly used protocols now are ART-NET and ACN. In our solution, we adopt the currently widely used ART-NET stage lighting Ethernet control protocol.
(2) DMX/Ethernet shared network design description In the field of stage, film and television lighting, networking is the development trend of lighting control. At present, in the networked lighting control systems of various lighting equipment manufacturers, the signal transmission protocols in the middle layer are roughly the same, and they are all based on Ethernet technology, TCP/IP signal transmission protocol and DMX-512 lighting control protocol. Ethernet provides powerful communication capabilities and is highly adaptable. It can make equipment of different brands compatible with each other. It passes multiple signals in one line. It is a protocol that can be continuously upgraded. It can effectively use bandwidth and is suitable for lighting, audio, and stage machinery. and protocols used across multiple workstations and locations of all sizes.
The main features of the DMX/Ethernet network system: high data transmission rate (≥100MBPS); supports two-way mutual backup for signal transmission (i.e. hot backup); supports remote information access (such as software upgrades; fault diagnosis, etc.); easy to establish, Maintenance and expansion (it is relatively easy to add or remove equipment); low bit error rate, high quality of data transmission; conducive to resource sharing; has system operating status and important parameter reporting function; compatible with all equipment that meets DMX standards (such as: dimming desk, dimming cabinet, effect lamp, color changer, etc.).
4.2. Stage lighting control equipment
The dimming console installed in the lighting control room is the control core of the entire stage lighting system, meeting the requirements for various comprehensive theatrical performances and conferences. It is in line with international advanced technology and suitable for China’s national conditions and lighting engineers’ operating habits.
The operation of the dimming console achieves fast and flexible control settings, powerful functions, and convenient on-site editing; it can be controlled centrally or individually dimmed.
In addition to the main console, an auxiliary backup dimming console is also configured. The main console itself should have an emergency backup main console, and the backup console must be of the same brand. The specific performance indicators are as follows;
(1) Main console (1024-channel optical fiber network dimming console); backup console (1024-channel optical fiber network dimming console)
Function Description
. Fast startup, less than 20 seconds. The main and auxiliary stations work online, and the auxiliary station continuously tracks the main station to achieve seamless switching.
. Electronic hard disk, can reliably store data. Switching power supply, wide voltage adaptability range. Requires external monitor, friendly interface, easy to operate
. Multiple data storage methods, including on-board storage, U disk storage, network backup, data backup to designated PC, main and auxiliary station backup
. Light path brightness activation adjustment and assignment. It has functions such as field, centralized control, effect, group, color changer control, macro, curve, report, etc. Can edit/modify, run, and view fields, and has manual field and light cut.
. Can edit/modify, run, and view effects. Can record/modify, use, and view centralized control. Wiring, can be connected to 1024 dimmers
. The field can call macros and effects, and the field can rise/fall according to the curve edited by the user. The dimming curve can be edited by oneself. The output has a switch mode, and the switch value can be set.
. Can control the color changer. When controlling the color changer, press “Later Priority”. . Can view the status of the dimming cabinet in real time. Light wheel + trackball for easy (activation) dimming and setting operations.
. Network DMX and DMX512-1990 signal output. Network DMX signal supports HDL-Net, ART-Net, and ACN protocols. DMX512-1990 signal can select the output starting loop and use photoelectric isolation output.
(2) 1024 professional computer lighting console
4 channels of DMX 512 signals are independently output. Can be configured with 1024 dimming channels or 240 computer lights. Can control computer lights with 40 channels. Can memorize 450 scenes or programs, 60 groups, and 50 snapshots.
It has 120 fully preset graphics built-in, which can be modified and edited at will. It has single and double preset modes, super mode, theater mode, script mode and tracking mode. Any programming, editing and modification are easy.
Optional internal clock control, external MIDI time code control or audio signal control. The unique drum selection program function and wheel adjustment function make operation an artistic pleasure. Simple operation, friendly interface and powerful functions make it easy for you to do whatever you want.
(3) Color changer console
Features: Large-screen blue backlight LCD with full Chinese menu display, suitable for use in dark environments, operation is clear at a glance; international standard DMX512 signal output, compatible with color changer products of the same signal standard from other manufacturers; has five output modes, which can be grouped arbitrarily ﹑Editing fields and colors, with fewer button presses and high programming efficiency; digital multi-level and stepless shuttle speed adjustment, controlled delay output, can adjust the signal independently in any output state, accurately control each light, and provide lighting Designers are provided with a lot of creative space; large-capacity memory can store 3584 scenes; color changer reset, static movement and working indicator light switch can be controlled to adapt to environmental requirements; signals are output through high-speed photoelectric isolation, stable, accurate, and resistant It has extremely strong interference ability, the transmission distance can reach 1200 meters, and it is not afraid of strong electric feedback burning the console; humanized design, good hand feeling, simple operation, all-metal panel, CNC processing, mold forming, LED work indicator light, luxurious and beautiful.
(4) 96-circuit optical fiber network dimming cabinet (6KW per channel)
D96PLUS Shuguang Network/Fiber Optic Intelligent Dimming Silicon Cabinet is the world’s first fixed dimmer that applies fiber optic control technology and network control technology. It can accept the network DMX signal control of multiple 4 independent devices, and can also report three-phase current and three-phase voltage, fan operating status, and lighting electrical parameters of each loop (such as output current, voltage, temperature and switching value, etc.) to the network system. Real-time data so that the system can realize real-time operating status monitoring. On the other hand, it can also accept its monitoring and working status settings (such as control loop preheating value, dimming curve selection and IP address, etc.) from multiple remote monitoring devices at the same time. Optical fiber network interface, variable sine wave output module, intelligent dynamic preheating, triple protection and 4000-level precision triggering. Unlimited user-programmable dimming curves and automatic voltage stabilization output and other excellent functions constitute the new highlight of Sugon I-type network dimming cabinet as a new generation of dimming products.
Function Description:
a. 96 outputs, each with a maximum output of 6KW
b. Built-in embedded Ethernet controller
c. Support network remote settings and centralized monitoring
d. Optical fiber, RJ45 and DMX interfaces can simultaneously receive more than two channels of standard DMX signals and more than two channels of “DMX signals transmitted by the network, that is, a total of more than four dimmer control signals can be received.
e. Optional and interchangeable cold light source, short circuit protection, variable sine wave or user-defined equal power output modules
f. Automatic voltage compensation function, when the input power supply voltage changes between 180-240V, the output voltage remains unchanged
g. The automatic load test function when the equipment is turned on can accurately test the load status such as open circuit and short circuit.
h. Load recording function can accurately test the actual power consumption of each load
i. Intelligent fan control function: automatically adjust fan speed according to temperature
j. Feedback function can monitor the working status of each dimmer module in each vertical cabinet
k. On-site dimming function to realize light targeting and emergency dimming
l. Backup scene recording, editing, and playback functions, with a maximum of 99 scenes
m. Has more than 10 fixed dimming curves, one of which is linear mode and one is switching mode. The switching point of the switching mode can be set arbitrarily (1-99%)
n. Users can freely edit any dimming curve
o. Maximum output level limit (0-100%)
p. Two fully digital high-precision hot backup trigger systems
4.3. Electricity requirements for stage lighting
The total power consumption of the stage lighting power supply is 650KW, voltage 380V, three-phase five-wire system, of which the dimming circuit is 500KW and the direct circuit is 150KW. In order to reduce interference, it is required that the main power supply line must not cross the stage performance area.
4.4. Room for stage lighting equipment
There is one stage lighting control room and one dimming silicon cabinet room.
4.5. Stage lighting control room
The lighting control room is a room used to control stage lighting equipment. The theater lighting control room is located in the back area of the auditorium, with an observation window that can see the entire stage. The length of the observation window shall not be less than 3 meters, the height shall not be less than 1 meter, and the clear height from the bottom edge to the ground shall be 0.8 meters. There are dimmer consoles, color changer consoles, computer light consoles, etc. in the room. The room must be ventilated, dissipated, equipped with insulated anti-static floors and wiring ducts. The clear height of the room shall not be less than 2.5 meters.
4.6. SCR chamber
The dimming machine room is a supporting room for lighting control. Its location should be close to the lighting area and power distribution room it serves. It is equipped with power distribution cabinets and silicon cabinets. The length of the room shall not be less than 10 meters, the width shall not be less than 3.5 meters, and the clear height shall not be less than 3 meters. Since the dimming silicon cabinet generates a large amount of heat when working, forced heat dissipation equipment is required in the lighting control room.
The upper surface of the equipment base must be flat, and the surrounding area must be covered with 3mm thick patterned steel plates. The maintenance walkway on the cable trench and the indoor floor must be covered with insulating rubber; the equipment bracket is made of steel material, and the whole is welded firmly, flat, and treated with fire protection.
4.7. Stage lighting construction technology and construction safety measures (the following content is omitted)

Theater auditorium lighting solutions