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Engineering Utilities 1 > Lights and Architectural Lighting Systems (PART 1) > Flashcards

Lights and Architectural Lighting Systems (PART 1) Flashcards

1
Q

It is the branch of physics that relates to the properties of light and the function of vision.

A

Optics

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2
Q

It involves a study of the human visual system and how it interacts with light

A

Optics

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3
Q

The inability to distinguish colors

A

Color Blindness

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4
Q

It is the energy radiated in the form of a wave caused by an electric field interacting with a magnetic field.

A

Electromagnetic Radiation

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5
Q

It is measured as the distance from one peak of one wave to the next wave.

A

Wavelength

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6
Q

It is the number of wave cycles per second and expressed in units of Hertz (hz)

A

Frequency

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7
Q

It is the wavelengths of electromagnetic radiation to which the human eye is sensitive

A

Visible light

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8
Q

Its that part of the EM spectrum capable of exciting the retina and ultimately producing a visual sensation

A

Visible light

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9
Q

Defined as the amount of light incident on (striking) a surface

A

Illuminance

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10
Q

Defined as the amount of light leaving an object

A

Luminance

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11
Q

It is the ratio of reflected light vs. the light striking the surface

A

Reflectance

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12
Q

It is the ratio of the light transmitted through body vs. the light illuminating the surface.

A

Transmittance

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13
Q

It is the ratio of the light absorbed vs. the light striking the surface

A

Absorptance

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14
Q

It is the ability to distinguish and interpret wavelengths of visible light

A

Color Perception

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15
Q

It is the ability to distinguish fine details. It is the “keenness” of vision that is necessary to perform tasks.

A

Visual acuity

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16
Q

A device that generates light

A

Lamp

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17
Q

It is a complete lighting unit,
which consists of a lamp (or lamps), lamp
socket(s), any lenses, refractors, or
louvers, any ballast (or ballasts), and the
housing.

A

Luminaire

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18
Q

It is the luminaire less the lamp(s). It includes the structural parts of a luminaire including any lenses, mounting supports, wiring, and ballasts, but does not
include the lamps.

A

Light fixture

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19
Q

It is the measure of the perceived power of light expressed in lumens (lm).

A

Luminous flux

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20
Q

It is the SI unit of luminous intensity—that is, the power emitted by a light source in a particular direction

A

Candela

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21
Q

the ratio of the light output of a light source (a specific lamp) to the electrical energy consumed to produce that light source.

A

Luminous efficacy

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22
Q

It is the color in lamp rating in Kelvin (K)

A

Correlated Color Temperature

23
Q

Color Temperature less than about 3500 K

A

Warm Lighting

24
Q

Color temperature greater than about 5000 K

A

Cool Lighting

25
Q

Color Temperature of the lamp is between temperatures of 4500 and 6500 K

A

Daylighting

26
Q

It is a method of numerically comparing the color distribution of a light source to a reference lamp

A

Color rendering index (CRI)

27
Q

It is a graphic presentation of the quantities of light emitted by a lamp by wavelength component

A

Spectral power distribution curve

28
Q

_______________ of a lamp is its median life expectancy, expressed in hours. It is the cumulative time that lapses before 50% of a representative group of lamps has failed and the other lamps in the group continue operating.

A

Rated Life

29
Q

It emit visible light as a result of heating; they incandesce

A

Incandescent lamps (I)

30
Q

It is is the familiar threaded base found with ordinary
lamps up to 300 W

A

Medium Base

31
Q

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

A

Candelabra Base

32
Q

It is a larger threaded base found on lamps that are
300 W or greater.

A

Mogul Base

33
Q

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

A

Long-life lamps

34
Q

are special versions of the standard
lamps that are helpful for rough or vibration service

A

Rough service lamps

35
Q

in applications where lamps are
broken fairly often

A

Plastic coated lamps

36
Q

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

A

Low-voltage lamps

37
Q

are a smaller, brighter, and more expensive version of the incandescent lamp

A

Tungsten-halogen lamps/ halogen lamps

38
Q

produces continuous light by passing electricity through a gas contained within the lamp

A

Gaseous discharge lamp

39
Q

is 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.

A

Ballast

40
Q

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

A

Ballast factor (BF)

41
Q

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

A

Fluorescent lamp

42
Q

are filament like coils at the end(s) of the bulb that act as terminals for the electric arc.

A

Cathodes

43
Q

are commercially available in straight, U-shaped of circular tubes in a variety of sizes, wattages, voltages, colors, and types of bases.

A

Linear fluorescent lamps (LFL)

44
Q

are miniaturized fluorescent lamps

A

Compact fluorescent lamps (CFL)

45
Q

the ratio of light (the luminous flux, in lumens) emitted by a fluorescent luminaire to the electrical energy consumed, including the ballast.

A

Luminaire efficacy rating (LER)

46
Q

It produce a very bright light by discharging an arc when electrical current passes through a metal gas contained under high pressure in a glass bulb.

A

High-intensity discharge (HID) lamps

47
Q

were the first commercially available HID lamps. These lamps are constructed of an internal quartz tube enclosed in an outer glass envelope.

A

Mercury vapor (MV) lamps

48
Q

are constructed in a manner similar to MV lamps except that in addition to the mercury and argon, various metal halides are included in the gas fill.

A

Metal halide (MH) lamps

49
Q

contain an internal arc tube made of a translucent ceramic material rather than quartz glass because of the high temperature (2350°F/1300°C) at which it operates

A

High-pressure sodium (HPS) lamps

50
Q

are really a blend between HID and fluorescent technologies. These lamps are constructed of a large sodium-resistant glass tube containing sodium and a neon–argon gas mixture.

A

Low-pressure sodium (LPS) lamps

51
Q

combine the luminous efficiency of an HID lamp with the good color rendering capability of an incandescent lamp

A

Blended lamps

52
Q

refers to a type of lighting that uses light-emitting diodes (LEDs), organic light-emitting diode lights (OLEDs), or polymer light-emitting diodes (PLEDs), instead of traditional lighting sources that use an electrical filament or gas inside a glass bulb.

A

Solid-state lighting (SSL)

53
Q

A semiconductor that consists of a chip of semiconducting material treated to create a structure with two-electron charged particles.

A

Light-emitting diode (LED)

54
Q

Two types of fluorescent lamps

A

Linear FL and Compact FL

Engineering Utilities 1 (7 decks)

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