一, Pre design planning: precise positioning and system integration
1. Matching spatial functionality with lighting environment
Illuminance calculation: Determine the illuminance standard based on the spatial use. For example, the lighting for art museum exhibits should be ≤ 50lux, while the lighting for office areas should be ≥ 300lux. Simulate light distribution and optimize lamp layout through lighting software such as DIALux.
Beam angle selection: Wall cleaning lighting should use a beam angle of 30 ° -60 °, with a narrow beam angle of 15 ° -30 ° required for key lighting. A high-end hotel lobby uses LED linear lights with a 24 ° beam angle to achieve a three-dimensional presentation of marble wall texture.
Color temperature control: 2700K-3000K warm light is recommended for residential spaces, and 4000K neutral light can be used for commercial spaces. Medical facilities require cold light above 5000K to improve visual clarity.
2. Pre embedded structural design
Ceiling installation: Reserve lamp slots during the light steel keel ceiling stage, with a slot width 3-5mm larger than the outer diameter of the lamps. Use 12mm thick flame-retardant plywood as the base layer, and cover the surface with 9.5mm gypsum board.
Wall installation: L-shaped aluminum alloy profiles should be used to close the external corners, and V-shaped grooves should be used to transition the internal corners. When installing the wall light strip in a certain art museum, a 2mm expansion joint is reserved between the profile and the base to avoid cracking.
Ground installation: Before tiling, a U-shaped stainless steel groove should be pre embedded and filled with waterproof mortar. The ground light strip of a commercial complex in Shenzhen adopts IP67 protection level to ensure passing the water pressure test.
3. Electrical system planning
Power configuration: When the power of a single light strip exceeds 100W, a 24V low-voltage power supply system is required. A certain exhibition center adopts a distributed power supply design, with a drive power box installed every 10 meters.
Line protection: Concealed lines must be threaded through metal hoses or JDG pipes, with a diameter not less than 1.5 times the cross-sectional area of the line. Moisture proof junction boxes should be used in damp areas such as bathrooms.
Intelligent control: Reserve DALI/DMX512 control lines to achieve zone dimming. A smart office building in Shanghai adopts the KNX system, which can adjust the brightness and color temperature of 2000 sets of lighting fixtures through a mobile app.
二, Standardized construction process: from slotting to debugging
1. Basic construction stage
Slot positioning: Use a laser level to determine the position of the lamp slot, with an error controlled within ± 1mm. The depth of the wall slot should be ≥ the thickness of the lamp+15mm, ensuring that it is flush with the wall after installation.
Profile fixation: M4 self tapping screws are used to fix aluminum alloy profiles with a spacing of ≤ 300mm. A theater project applies structural adhesive to the back of the profile to enhance the bonding strength with the base layer.
Concealed engineering acceptance: Focus on checking the insulation resistance (≥ 0.5M Ω), grounding resistance (≤ 4 Ω), and profile flatness (≤ 2mm/2m) of the circuit.
2. Lamp installation stage
Lamp strip laying: Use specialized roller tools to install flexible lamp strips to avoid damage to the lamp beads. A 45 ° splicing process is required at the corner, and a certain case shows that this process can increase the naturalness of the light spot transition by 40%.
Installation of transparent cover: When using acrylic diffusion board, a 3mm expansion gap needs to be reserved. A high-end residential project uses a nano coating translucent cover with a transmittance of 92% and excellent anti fingerprint performance.
Buckle fixation: Embedded lamps require the use of spring buckles, and each lamp should be equipped with at least 2 sets of buckles. A certain subway station project adopts anti drop buckle design, which has passed 1000 vibration tests without looseness.
3. System debugging phase
Power on test: Conduct segmented power on inspection to check the working status of the light strip, and use an illuminance meter to verify the deviation between the actual illuminance and the design value (≤± 10%).
Dimming calibration: Set the 0-100% brightness curve through a professional dimmer to ensure that there is no flicker during the dimming process (flicker index<5%).
Intelligent system joint debugging: Test scenario mode switching response time (≤ 200ms), grouping control accuracy (100%), and remote control stability.
三, Quality acceptance and maintenance management
1. Acceptance criteria system
Appearance quality: The surface of the lamp is free of scratches and color differences, and the translucent cover is free of bubbles and impurities. A certain project uses a colorimeter for detection, and the Δ E value is controlled within 1.5.
Optical performance parameters: Color rendering index Ra ≥ 90, R9 ≥ 50; Power factor ≥ 0.95; Color tolerance ≤ 3SDCM.
Safety performance: Passed 3750V high voltage test (no breakdown for 1 minute), insulation resistance ≥ 2M Ω, grounding resistance ≤ 1 Ω.
2. Common problem handling
Uneven light spot: Adjust the distance between the light strip and the translucent cover to 30-50mm, or use a frosted diffusion cover instead. A certain exhibition hall has increased the uniformity of the light spot from 0.7 to 0.9 by adding a microprism structure.
Electromagnetic interference: Install a filter at the output end of the driving power supply to ensure that the EMI test passes CISPR 15 standard.
Poor heat dissipation: Adding graphene heat sinks on the back of the lamp can reduce the junction temperature by 15 ℃, as shown in a certain case.
3. Maintain management standards
Regular cleaning: Use a microfiber cloth to wipe the translucent cover every quarter, avoiding the use of corrosive cleaning agents such as alcohol.
Life monitoring: Establish a record of the lifespan of lighting fixtures, and replace LED light sources promptly when their lifespan declines to 70%.
System upgrade: Evaluate the compatibility of the intelligent control system every 3 years and reserve interfaces to support the integration of new technologies.
