Lighting

Lighting

Industry: Construction

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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)

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.