Pay attention to the problems of LED construction
It is the general trend that led lights replace traditional lamps, so how to replace them, and what should be paid attention to in LED construction in energy-saving renovation, let's talk about this issue, which is of reference significance for you.
1. Light source lamp holder: At present, LED light sources are often used instead of metal halide lamps and high-pressure sodium lamps. Some lamp holders remain unchanged, and the lamp holder is directly connected for use. For the convenience of replacement, the specific lamp holder and power relationship are listed as follows:
E27 lamp holder: incandescent lamp 40～100W, metal halide lamp 70～150W, high pressure sodium lamp 70～150W; led bulb replacement
E40 lamp holder: metal halide lamp 175～2000W, high pressure sodium lamp 150～100W;
G13 lamp holder: fluorescent lamp 18～58W; replace with T8led lamp
G5 lamp head: lamp tube 14w, 28w, 56w; use T5led fluorescent tube instead
FC-2 lamp holder: double-ended metal halide lamp 250～400W; double-ended high pressure sodium lamp: 250～400W.
During construction, as long as the type of lamp is found and the corresponding lamp holder is found, it can be directly replaced by LED lamp.
Downlights and ceiling lights can be replaced with LED downlights and LED ceiling lights of the same specifications respectively.
The grille light panel can be replaced by LED panel light
2. Several elements to test lighting quality
(1) Brightness distribution. The perception of brightness and darkness of an object observed by the human eye depends on the brightness of the object. The contrast between the brightness of the object and the background is too large or too small to make the observer clearly distinguish the object.
(2) Glare limitation. The degree of glare is an important factor affecting the quality of lighting systems.
(3) Illumination uniformity. It refers to the ratio of the minimum illuminance to the average illuminance of the working surface. my country stipulates that this value should not be less than 0.7.
(4) Light source color. There are two indicators for measuring the color of the light source: one is the color temperature of the light source, which determines the cold or hot feeling of the light source itself; the other indicator is the color rendering index of the light source.
(5) Instability of illumination. The instability of illuminance is mainly due to the change of the luminous flux of the light source, and the change of the luminous flux is mainly caused by the voltage fluctuation of the lighting power supply. Therefore, to make the illuminance stable, the quality of the voltage must be guaranteed
(6) Strobe effect. Since the luminous flux of the electric light source changes with the periodic change of the AC voltage, the human eye can clearly feel the flicker, and the LED can eliminate the stroboscopic effect.
(7) Illumination requirements. Outdoor lighting: including various squares, parking lots and outdoor sports grounds and other common outdoor lighting, outdoor lighting generally uses high-intensity gas discharge lamps as light sources, such as LED lamps instead of
3. Notes on led street lights
(1) Heat dissipation is a problem that needs to be solved. Due to the high brightness requirements and large heat generation of LED street lamps, its brightness and heat generation are easy to operate.
Efficiency is closely related to temperature. Since the street lamp has the characteristics of outdoor use at night, the heat dissipation area must be saved to facilitate the natural convection heat dissipation of the air.
(2) The biggest feature of LED is the function of directional emission of light, because almost all high-power LEDs are equipped with reflectors, and the efficiency of such reflectors is significantly higher than that of lamps. Its characteristics should be fully considered when designing
(3) If the outdoor lamps are exposed to the environment for a long time, the surface must be resistant to corrosion. For the connection parts of the lamps, use stainless fasteners.
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