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EEU CHAP 4 > Types of Artficial Light Sources > Flashcards

Types of Artficial Light Sources Flashcards

1
Q

Also known as light bulb by the lay consumer

A

incandescent lamps

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2
Q

The _______ the filament of incandescent lamps, the more _________ the lamp is in converting electricty into light and _____ the light.

A

hotter, more efficient, whiter

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3
Q

In incadescent lamps, hotter operation reduces lamp life. ( T/F)

A

T

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4
Q

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.

A

4600, 6000

red, orange, yellow.

argon, krypton, xenon

3, 1000, 6, 277

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5
Q

_______ 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

A

Threaded, pinned

Medium base

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6
Q

It is a smaller threaded base used in ornamental lighting such as chandeliers.

A

Candelera base

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7
Q

larger threaded base found on lamps that are 300 W or greater

A

Mogul base

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8
Q

used in applications where the difficult or cost of changing lamps is prohibitive

A

long-life lamps

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9
Q

special version of standard lamps that are helpful for rough or vibratin service

A

rough service lampS

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10
Q

not unbreakablle but they break less frequently and when they break, the shattered glass contained within the plastic coating

A

plastic-coated lampS

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11
Q

used in decorative and accent lighting applications that require good control or higlighting

A

low-voltage lampS

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12
Q

Frequently called “halogen lamps” a smaller, brighter and more expensive version of incandescent lamps.

contain gases such as ______ ______

A

tungsten-halogen lampS

iodine , bromine

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13
Q

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

A

gaseous discharge lampS

ultraviolet radiation

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14
Q

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.

A

ballast

20

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15
Q

type of ballasts, increase and control voltage, heavy noise

A

magnetic or iron ballasts

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16
Q

less noise, and capable of dimming lamp

A

electronic ballasts

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17
Q

extremely annoying in quite places

A

ballast noise

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18
Q

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.

A

Ballast Factor

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19
Q

________ and __________ should be matched so the luminaire can produce the largest light output.

A

ballastS , lampS

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20
Q

it is composed of a tubular glass bulb that is covered with a thin phosphor coating on its inside surface

A

fluorescent lamps

21
Q

Fluorescent lamps is a glass bulb with a low pressure gas containing ___________.

A

mercury vapor

22
Q

___________ are filament-like ______ at the end of the bulb that act as terminals for the electric circuit.

A

cathodes, coils

23
Q

these are commercially available in U shaped of circular tubes in variety of sizes, wattages, voltages, colors and types of base.

A

linear fluorescent lamps

24
Q

This type of fluorescent lamp offer higher output in comparison to standard output fluorescent lamps., consumes more power, lower efficacies, warehouse, factories, school gymnasiums

A

High Output and Very High Output fluorescent lamp

25
Q

these are miniaturized fluoresent lamps

designed as a substitute for standard size incandescent lamp

A

compact fluorescent lamps (CFL)

26
Q

Fluorescent lamps are
available in wattages of
between ___ to ____ W and
lengths of ___ to ____ inches.

A

20 - 125

6-96

27
Q

The _________ blend in a fluorescent lamp determines the color temperature and color rendering of the light emitted by the lamp.

A

phosphor

28
Q

___________ are the most popular, least expensive, and lowest quality phosphors.

A

halo phosphors

29
Q

All fluorescent lamps are designed to operate at a specific air temperature, usually a surrounding air temperature of ____ degree Farenheit

A

77

30
Q

It is the ratio of light ( luminous flux) emmited by the fluorescent luminaire to the electrical energy consumed, including ballast.

A

Luminaire Efficacy Rating

31
Q

This lamps produce a very bright light by discharging an arc

includes mercury vapor, _____________, and high pressure ________ lamps

A

High Intensity Discharge LampS

metal halide, sodium

32
Q

this contains the fill gas

A

internal arc tube

33
Q

These are the first commercially available HID lamps

A

mercury vapor lampS

34
Q

MV lamps are availbel in wattages ranging from ___ to _____ W.

A

50 , 1000

35
Q

MV lamps are constructed of an internal _____ tube enclosed in an outer glass envelope.

A

quartz

36
Q

These are constructed similar to MV lamps except that it has various ________ added to mercury and argon in the glass fill.

offers much better efficay and color rendition

available in wattages up to ___ to ______ W

A

Metal Halide lampS, metal halide

32 1000

37
Q

This contain an internal arc tube made of translucent ceramic material rather than _________ glass because of the high temperature.

Available in wattages rating from ___ to ______ W

A small amount of solid metallic _____ and ______ is sealed in a _____ glass fill inside the ceramic arc tube.

sodium, mercury, xenon

A

High-pressure sodium lampS, quartz

18, 1000

38
Q

are a blend between HID and fluorescent lamps

and it produces a __________________ yellow light consisting of almost entirely of orange-yellow wavelengths

A

Low-pressure sodium lampS

monochromatic

39
Q

Full light output does not occur immediately when power is applied, there is a start-up time delay called _________ before the lamp reaches it peak output.

(LPS lamps)

A

strike time

40
Q

A restart delay called the ________ of one to several minutes is needed before the lamp reached its peak output

( LPS Lamps)

A

restrike time

41
Q

this lamps combine the luminous efficacy of an HID lamp with the good color rendering of an incandescent lamp, no start time and this total luminous flux is available immediately.

A

blended lampS

42
Q

The advantage of this lamp is that they are interchangeable with incandescent lamps and have longer life, but they cannot be dimmed

A

mercury-tungsten blended lampS

43
Q

this referes to the type of lighting that uses light-emitting diodes ( LEDs), organic LEDS, or polymer LEDs

A

solid-state lighting

44
Q

It is a semiconductor that consists of a chip of semiconducting material treated to create a structure of two electron-charged electrons.

A

light-emitting diodeS

45
Q

LED individual chips emits light in a specific ____________________, so the light source is near _____________.

A

wavelength, monochromatic

46
Q

RED LED - __________________
BLUE LED- _______________
GREEN LED- ___________________

A

aluminum gallium arsenide
indium gallium phosphide
aluminum gallium phosphide

47
Q

Fluorescent and HID lamps have some ________ content.

A

mercury

48
Q

How can white light be achieved in LED

A

phosphor conversion
RGB systems

EEU CHAP 4 (8 decks)

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