Flashcards in Module 4, Lesson 3 Deck (32):
1
Fluorescent light characteristics
Most common light source outside of the house, coated in phosphor and a small amount of mercury, and contains cathodes
2
How a fluorescent illuminates
Voltage is applied to the cathodes, electrical arc jumps thje length of the tube, this energizes the phosphorus by ultraviolet light, and produces light
3
How many lumens of light per watt of electricity are consumed
65-75
4
4 types of common fluorescent bases
Bi-pin, single pin, recessed double contact, and compact fluorescent series
5
Shapes of fluorescents
Ring or circular, u-shaped, double-folded, and compact
6
Fluorescent currents are measured in
Milliamps
7
3 main operating currents
Pre-heat, instant-heat, and rapid-heat
8
Fluorescents and incandescents have what in common
Coding systems
9
Coding systems designate what
Color illumination
10
Fluorescent ballast characteristics
Regulates current, generates starting and operating voltage, considered part of the fixture, provides the voltage "kick" to start the lamp called "striking the arc" ", and all have ballast rating codes
11
CBM stands for
Certified Ballast Manufacturer
12
Many compacts have this installed
Ballast
13
Electronic fluorescent ballast characteristics
Good for electrical distributors, new laws of energy requirements, all has to do with energy consumption and better products, little or no noise, lighter, and longer life
14
Fluorescent luminarie characteristics
Sold with ballast, housing, and cover, see a lot in commercial apps
15
Troffer
Fixture that mounts recessed in the ceiling
16
4 categories for recessed fluorescent fixtures
Static, air supply, heat extraction, and combo
17
Fluorescent troffer fixture types
Grid-type, type F, surface mounted, base-bones, open reflector, and wrap-around
18
Grid-type
Lay in for suspended ceiling
19
Type F
Mounted in sheetrock with flanges and wire hinges
20
Surface mounted
Most common
21
Bare-bones
Just has a housing, ballast, and lamp
22
Wrap-around
Actually hung from the ceiling
23
Open reflector
Used in industrial settings where utility is primary consideration
24
What do reflectors provide
A degree in "up-light" or the light reflected from the ceiling
25
What can reflectors be made of
Baked enamel, aluminum, procelian, and plastics
26
2 electronic ballast operating modes
Instant-heat and rapid-heat
27
Ballast power factor
Measurement of how effectively the input current is converted into usable power
28
Define diffusers
Glass or plastic lamp covers in a number of different styles
29
Lenses
Glass of plastic covers that focus on the direct light from of the lamp
30
2 types of plastic lenses
Extruded or injection-molded
31
The most common type of lens
The prismatic type
32