Should be utilized with polarity switches. An oxide coating deposited on a cathode that emits electrons when heated. The threadlike tungsten wire that incandesces or lights up when an electric current runs though it. The light source in an incandescent lamp. Light resulting from the action of ultraviolet or other forms of energy on phosphors.
Fluorescence occurs only while energy is being absorbed by the fluorescing material.
High ceiling, usually in an industrial plant. Because of height, it may be hard to reach for lamp changers without special ladders or scaffolding. Usually above 20 ft. Will usually operate at low temperatures near zero and still produce high light output. Voltage of 208 and higher.