A good light by illumination, brightness, glare, shadows, color, stability factors and constraints. (1) illumination. Is accepted luminous flux per unit area. (2) the uniformity of the illuminance. (3) The brightness distribution. Glare control (4). (5) the color rendering properties of the light source. Bright and concise. And decoration style match up better. There are also try to be energy-efficient, not more light, the brighter the better.

The use coefficient depending on the room size and wall floor material, its value is different. Room coefficient = Room Room L × W / high room (room + room wide) general classroom ceiling, walls, floors reflectivity of 70%, 50%, 30%. Their respective values ​​of different lamps is also different, in a lighting fixture is selected, the room coefficient corresponding the Cikuan lighting of said transmission rate (generally its products various data) can be investigated using the coefficient can be obtained from the lighting fixture manufacturers. The prices of different sizes, different types of lamps, the use coefficient absolutely different. I generally looked at general usage factor between 0.3-0.8, if not what conditions is 0.6 I think is wrong with. The other upstairs interpretation all came clear, the various values ​​into the formula to calculate the number of lamps. But one thing should remind you that power density requirements: 11.00W/m2 the mandatory targets must be reached. But also guarantee 300Lx illuminance, therefore, its essence is to use highly efficient lamps (90Lm / W lamps) over the color temperature of the lighting between 3500-5000K, CRI Ra 80 or more.

Foundation depth is generally light pole height 1/6-1/8, length and width according to your street light lamp type may be, in general, the 600mm-800mm square. , The other should be based on four embedded screws (minimum can not be less than the M20), the screw embedded size is generally 600mm-800mm, do not forget to add embedded PVC casing. As for its overturning resistance, Statistics unto you a year in average wind speed, this can go to the Bureau of Meteorology to check, and then calculate the wind pressure plus a light pole on the light pole itself torque, so you'll know it's the basis of probably should bear the stress, and then down to the actual measurement of the local geological report, will be able to specifically know the street around the foundation required intensity, as how to deal with the most simple is do thirty-seven lime soil.