(3) Types of Artificial Light Sources Flashcards
emit visible light as a result of heating; they incandesce
incandescent lamps (I)
the familiar threaded base found with ordinary lamps up to 300 W
medium base
a smaller threaded base used in ornamental lighting such as chandeliers
candelabra base
a larger threaded base found on lamps that are 300 W or greater
mogul base
used in applications where the difficulty or cost of changing lamps is prohibitive
long-life lamps
special versions of the standard lamps that are helpful for rough or vibration service
rough service lamps
in applications where lamps are broken fairly often
plastic coated lamps
used in decorative and accent lighting applications that require good control or highlighting
low-voltage lamps
a smaller, brighter, and more expensive version of the incandescent lamp
tungsten-halogen lamps/ halogen lamps
produces continuous light by passing electricity through a gas contained within the lamp
gaseous discharge lamp
a voltage transformer and current limiting device designed to start and properly control the flow of power to discharge light sources such as fluorescent and HID lamps
ballast
the ratio of a lamp’s rated output (lumens) when it is operated on a specific commercially available ballast as compared to light output (lumens) when operated on a reference ballast
ballast factor (BF)
composed of a tubular glass bulb that is covered with a thin phosphor coating on its inside surface
fluorescent lamp
filament like coils at the end(s) of the bulb that act as terminals for the electric arc
cathodes
commercially available in straight, u-shaped of circular tubes in a variety of sizes, wattages, voltages, colors, and types of bases
linear fluorescent lamps (LFL)
_____ and _____ fluorescent lamps offer higher light (lumen) output in comparison to standard output fluorescent lamps, but these lamps consume more power and have significantly lower efficacies
high output (HO) and very high output (VHO)
miniaturized fluorescent lamps
compact fluorescent lamps (CFL)
7 W CFLs replace ____
25 W incandescent lamps
11 W CFLs replace ____
40 W incandescent lamps
13 W CFLs replace ____
60 W incandescent lamps
19 W CFLs replace ____
75 W incandescent lamps
23 W CFLs replace ____
100 W incandescent lamps
the ratio of light (the luminous flux, in lumens) emitted by a fluorescent luminaire to the electrical energy consumed, including the ballast
LER = (EFF x TLL x BF) /W
luminaire efficacy rating (LER)
EFF stands for _____
luminaire efficacy
