The promotion, popularization and wide application of LED lighting technology and products have made it possible to retrofit lighting energy-saving in various types of places across the country. However, in the specific lighting energy-saving renovation project, it is often because manufacturers and owners are more focused on the quantitative dimension of “energy savingâ€, ignoring the demand for lighting quality (such as glare control, color rendering and color temperature). Leading to some well-designed projects, the lighting effects have been greatly reduced after the renovation. It is said that the transformation of the Hong Kong Red Wax Point Airport, which saves 50% of the electricity bill after switching to LEDs, is one of them. 
At Chek Lap Kok Airport in Hong Kong, we can still see the high level of pursuit and high level of glare control in the original lighting design, as well as the careful layout and design of the spatial brightness distribution. However, after the LED energy-saving transformation, the glare control is obviously a bit unattainable.
The basic lighting of the exit aisle is a double-tube T8 grille lamp. The cavity of the lamp itself is deep, the intercept angle is large, and the glare control is very good. If you don't look up for your professional habits, you can't basically feel the presence of the luminaire. This lamp has now been replaced with an LED tube, and the effect is ok.
In the middle of the lighting belt, natural light is added to supplement the indoor lighting. The T8 grille lamps are connected to the lamp strips on both sides. It can be seen that the wall on the left side has a high brightness, and the glass on the right side is partially partitioned, and some light boxes.
Look carefully at the two rows of lights in the picture below, you will find the design of the light distribution of the polarized wall, you can see the designer's good intentions: the left row of lights with the wall to improve the visual brightness of the wall, the right row of lights The role of the belt is to increase the vertical illumination on the conveyor belt; while taking into account the comfort requirements of the space and the visual function and communication needs.
The effect of polarizing the wall is good, the uniformity is good, and the hairline is also very high~~
The replacement of LED downlights can be said to be a big failure. After the replacement of this luminaire, the glare effect is everywhere in the entire airport space. I think the only far-fetched explanation I can make is to use the "glare of glare" to alert passengers at the end of the conveyor belt.
The introduction of natural light, the combination of secondary reflection and floodlights , the two-layer LED downlight on the left side of the above figure and the right side of the figure below is still a "bright spot".
Originally used metal halide downlights, glare control is significantly better than the above LED downlights, there will be no direct light source in the field of view.
The use of indirect lighting fixtures that emit light up and down creates an open and comfortable environment for low spaces. Fortunately, because the LED tube can not be 360 ​​° light, no replacement, still maintain the original T5 light source.
This is the transition zone from the customs clearance to the baggage waiting area. The space is very low (about 2.5m visually). It is a surface-mounted secondary reflector lamp. It looks very noisy.
But if you look at the baggage claim hall (on the right side of the picture), you will find that the brightness of the ceiling is necessary for the entire space.
From the above picture we can see that the entire baggage claim hall has a high space and good light, but basically does not feel the presence of the lamp, just like it is outdoors on a cloudy day. The spot on the wall leaked the secret very well. From the visual point of view: the LED light source replaced the traditional fluorescent light source, and the light distribution of the lamp became very different. And the light color is blue, it is a kind of light that is very uncomfortable.
At present, there are many "misunderstandings" in the domestic energy-saving renovation of lighting. These misunderstandings, such as lighting quality alone, are only for energy conservation considerations. As owners, designers and manufacturers, these stakeholder roles, during the project, some of them are really not understood, some are not understood, and some are intentional. Confused.
Finally, a little joke, to the netizen:
A man ran home and said to his wife: I saved a dollar today, I ran back with the bus.
The wife said angrily: Why don’t you run with a taxi and save 10 yuan!
Although the jokes are jokes, the data obtained from many energy-saving renovation projects in China are probably “following taxisâ€.
The difference is that this really gives money.
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