8 Terms
Contributors in Lighting
Lighting
stroboscopic effect
Construction; Lighting
Condition where rotating machinery or other rapidly moving objects appear to be standing still due to the alternating current supplied to light sources. Sometimes called "strobe effect."
underwriters' laboratories (UL)
Construction; Lighting
An independent organization whose responsibilities include rigorous testing of electrical products. When products pass these tests, they can be labeled (and advertised) as "UL listed." UL tests for ...
self-luminous exit sign
Construction; Lighting
An illumination technology using phosphor-coated glass tubes filled with radioactive tritium gas. The exit sign uses no electricity and thus does not need to be hardwired.
light emitting diode (LED)
Construction; Lighting
An illumination technology used for exit signs. Consumes low wattage and has a rated life of greater than 80 years.
lumen
Construction; Lighting
A unit of light flow, or luminous flux. The lumen rating of a lamp is a measure of the total light output of the lamp.
