20 Terms
Contributors in Lighting
Lighting
low-voltage lamp
Construction; Lighting
A lamp ( typically compact halogen ( that provides both intensity and good color rendition. Lamp operates at 12V and requires the use of a transformer. Popular lamps are MR11, MR16, and PAR36.
high pressure sodium lamp
Construction; Lighting
A high intensity discharge (HID) lamp whose light is produced by radiation from sodium vapor (and mercury).
lay-in-troffer
Construction; Lighting
A fluorescent fixture; usually a 2' x 4' fixture that sets or "lays" into a specific ceiling grid.
very high output (VHO)
Construction; Lighting
A fluorescent lamp that operates at a "very high" current (1500 mA), producing more light output than a "high output" lamp (800 mA) or standard output lamp (430 mA).
tungsten halogen lamp
Construction; Lighting
A gas-filled tungsten filament incandescent lamp with a lamp envelope made of quartz to withstand the high temperature. This lamp contains some halogens (namely iodine, chlorine, bromine, and ...
thermal factor
Construction; Lighting
A factor used in lighting calculations that compensates for the change in light output of a fluorescent lamp due to a change in bulb wall temperature. It is applied when the lamp-ballast combination ...
