Sonja Mairenn. Lighting. August 06th , 2017.
LED light angle is divided into effective angle and the actual light angle. The luminous intensity value is half the direction of the axial intensity and the direction of the light-emitting axial (normal) is the effective angle. Half of the half angle of the angle (or half power angle) is the actual light angle. In the axial strength of half the angle because the light is too weak in practical applications do not count the effective angle. (The picture below shows the side view of the piranhas particles, the angle between the solid line and the dashed line is not included in the effective angle)
3.According to the decisions made in the previous step, the variety of styles, brightness levels and the likes can be chosen and bought. In addition, one must also ensure that the transformer will be able to take on the load of all the lights that are to be installed.
Should be placed such that they do not hinder your function (e.g. place wall sconces beside mirrors instead of a single one atop, to avoid shadows)
Find out what types of light the fixture will support (e.g. LED, incandescent bulbs, CFLs), and ensure that it is easily available. Also, check what wattage of light is best suited to the fixture. It should not be too dull, but it should not burn through the fixture and become too harsh or even affect the fixture itself. For light fixtures that can serve more than one purpose, choose those that have a dimming feature so that you can adjust the light according to your needs when necessary. This can apply to chandeliers, pendant lamps, and floor and table lamps.
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