Types of Artficial Light Sources Flashcards
(48 cards)
Also known as light bulb by the lay consumer
incandescent lamps
The _______ the filament of incandescent lamps, the more _________ the lamp is in converting electricty into light and _____ the light.
hotter, more efficient, whiter
In incadescent lamps, hotter operation reduces lamp life. ( T/F)
T
Incadescent filaments can reach temperatures of between ________ and ________.
Also, electromagnetic radiation from filament inclused a signigificant amount of visible light mainly in _____, _____, _____ wavelengths.
The filament can be operated at higher temperatures with chemically inert fill gases such as _______, ________, ________.
Incandescent lamps have wattages between __ to _______ W and voltages of ___ to ____ V.
4600, 6000
red, orange, yellow.
argon, krypton, xenon
3, 1000, 6, 277
_______ or ______ bases hold the lamp in the socket and attach the lamp to the electrical circuit.
It is familiar threaded base found with ORDINARY LAMP up to 300 W
Threaded, pinned
Medium base
It is a smaller threaded base used in ornamental lighting such as chandeliers.
Candelera base
larger threaded base found on lamps that are 300 W or greater
Mogul base
used in applications where the difficult or cost of changing lamps is prohibitive
long-life lamps
special version of standard lamps that are helpful for rough or vibratin service
rough service lampS
not unbreakablle but they break less frequently and when they break, the shattered glass contained within the plastic coating
plastic-coated lampS
used in decorative and accent lighting applications that require good control or higlighting
low-voltage lampS
Frequently called “halogen lamps” a smaller, brighter and more expensive version of incandescent lamps.
contain gases such as ______ ______
tungsten-halogen lampS
iodine , bromine
Electricity passing through a gas that it causes the gas to arc.
It produces CONTINUOUS light by passing electricity through a gas contained within the lamp.
produces ______________ that causes a phosphor coating inside the lamp to glow
gaseous discharge lampS
ultraviolet radiation
it is an additional device that is required in all gaseous discharge lamps.
A voltage transformer and current-limiting devoce designed to start properly control the flow of power to discharge light sources such as fluoresent and HID lamps.
It can consume up to ___ % of the electricity used to power a luminaire.
ballast
20
type of ballasts, increase and control voltage, heavy noise
magnetic or iron ballasts
less noise, and capable of dimming lamp
electronic ballasts
extremely annoying in quite places
ballast noise
It is calculated by dividing the lumen output of a lamp ballast combination by the lumen output of the same lamp on a reference ballast.
Ballast Factor
________ and __________ should be matched so the luminaire can produce the largest light output.
ballastS , lampS
it is composed of a tubular glass bulb that is covered with a thin phosphor coating on its inside surface
fluorescent lamps
Fluorescent lamps is a glass bulb with a low pressure gas containing ___________.
mercury vapor
___________ are filament-like ______ at the end of the bulb that act as terminals for the electric circuit.
cathodes, coils
these are commercially available in U shaped of circular tubes in variety of sizes, wattages, voltages, colors and types of base.
linear fluorescent lamps
This type of fluorescent lamp offer higher output in comparison to standard output fluorescent lamps., consumes more power, lower efficacies, warehouse, factories, school gymnasiums
High Output and Very High Output fluorescent lamp
