To select right LED flood light is not an easy thing if you know nothing about the Internet,lighting principle even the basic brand and specification. With the development of the society,one is supposed to choose the online products more often without stepping out of the house.
It is equal to the number of degrees between the ten percentage of maximum candlepower (near the center of the beam) locations. Since the ten percentage locations are generally near the edge of a floodlight's beam, the illumination at the edge is one tenth or less of that at the beam center. To obtain reasonable uniformity, the beams of individual floodlights must overlap each other as well as the edge of the surface to be lighted.
It is said that the percentage of beam lumens falling outside the area to be lighted is usually lower with narrow-beam units than wide-beam units. Under this consideration,narrow-beam floodlights are preferable where they will provide the necessary degree of uniformity of illumination and the proper footcandle level.
When you choose LED flood light, LED tube,you should know what to consider and how to find a good quality product. As long as you know the principle and the way to find out nice supplier,you are sure to own a good one.