Module 4, Lesson 4 Flashcards Preview

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Flashcards in Module 4, Lesson 4 Deck (24):
1

HID (High Intensity Discharge) light source characteristics

Brightest and most efficient (2006), Light large areas, very high output, contains an arching element inside a pressurized bulb, requires a ballast, requires a "light up" time, slow "restarts", and wide voltage range

2

HID common voltage range

120-480

3

Average time it takes and HID to fully light up

3-15 minutes

4

4 major families of HID lamps

Mercury vapor, metal halide, high pressure sodium, and lower pressure sodium

5

Mercury vapor characteristics

50 lumens of light per watt consumed

6

Metal halide characteristics

80-100 lumens of light output consumed, step up from mercury vapor, operates at high temps, 3-5 minute start up, 8-20 minute hot restart, and depreciates faster

7

High pressure sodium characteristics

Most efficient of the four, takes only 4 minutes to fully turn on, and only 1 minute for "hot restart"

8

Low pressure sodium characteristics

Comes in completely different shapes, 7 to 15 minute start ups, immediate hot restarts, and several gasses make it up

9

Basic difference between the 4 major families

The chemical gas compounds in the gas tubes and all have different efficiency

10

Metal Halide HID's can heat up to

55 degrees Celsius or (150 F)

11

Another common name for HID ballasts is

Power packs

12

HID luminaries for different applications

Industrial, commercial, and outdoor

13

Industrial luminaries

Used around heavy assembly lines

14

Commercial luminaries

Sports arenas and more concerned with aesthetic quality

15

Outdoor luminaries

Football stadiums, parking lots, and mounted on poles

16

What are HID's called that are 18 feet above the work place

High bay

17

What are HID's called that are 10 feet above the work place

Low bay

18

2 options for ballasts

They can be self-contained (inside the HID) or external (mounted)

19

Voltages that can be used with HID's

120, 208, 240, 277, 480, and multitap

20

A starter and ignitor are need for what

The striking of the arc

21

What does a HID ballast consist of

Coil assembly, core, and capacitor

22

HID fixture mounts

Ceiling surface-mounted, recessed, or wall-mounted

23

Specialized HID ballasts are designed to operate at what temp

65 degrees Celsius

24

Pole-mounted application factors

Weight of the fixture, wind velocity, pole strength, pole height, area of alluminance, and the hardware needed to attach the fixture to the pole