You already know to be measured per square meter. However, with "How many watts per square" was wrong, should be "the number of lumens per square", or "illumination. " You think, ah, the light efficiency of different light, like an ordinary fluorescent lamp 50 lumens per watt, T8 fluorescent trichromatic more than 70 lumens per watt, T5 fluorescent trichromatic more than 80 lumens per watt. If the same 40 watts, more than 2,000 lumens of ordinary, while the T5 to the three primary colors of more than 3200 lumens.
Lumens is the brightness, with the illumination of "the number of lumens per square"in order that the brightness of the illuminated environment.
Illumination is not a simple matter to calculate, in addition depends on room size, depends on how high hanging light (high to be reasonable), but also the degree of reflective walls and so on.
Generally speaking, supermarket 6500K, the illumination of 250 to 300 lumens / square meter. If hanging 3 meters high, can be 500 to 600 lumens / square meter to calculate the amount of lumens needed; also consider the number of lamps light uniformity.
Add the so-called "hanging 3 meters high"refers to the distance of light to be illuminated objects. I plant design, to light to the table hanging from the high range. Not the same as the supermarket, and today I look specifically examined the size of the supermarket, the object is a heap of high level, the size of the truck not the same as the supermarket shelves are not the same interval.
By light from the top shelf one meter high estimate, with the T5, T8 energy-saving lamps, 3-4 watts per square meter; with the general energy-saving lamps, 5-6 watts per square meter. This is only an estimate, but Mama Huhu, also almost the same.
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