Module 4, Lesson 4

Question 1

HID (High Intensity Discharge) light source characteristics

Answer 1

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

Question 2

HID common voltage range

Answer 2

120-480

Question 3

Average time it takes and HID to fully light up

Answer 3

3-15 minutes

Question 4

4 major families of HID lamps

Answer 4

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

Question 5

Mercury vapor characteristics

Answer 5

50 lumens of light per watt consumed

Question 6

Metal halide characteristics

Answer 6

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

Question 7

High pressure sodium characteristics

Answer 7

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

Question 8

Low pressure sodium characteristics

Answer 8

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

Question 9

Basic difference between the 4 major families

Answer 9

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

Question 10

Metal Halide HID’s can heat up to

Answer 10

55 degrees Celsius or (150 F)

Question 11

Another common name for HID ballasts is

Answer 11

Power packs

Question 12

HID luminaries for different applications

Answer 12

Industrial, commercial, and outdoor

Question 13

Industrial luminaries

Answer 13

Used around heavy assembly lines

Question 14

Commercial luminaries

Answer 14

Sports arenas and more concerned with aesthetic quality

Question 15

Outdoor luminaries

Answer 15

Football stadiums, parking lots, and mounted on poles

Question 16

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

Answer 16

High bay

Question 17

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

Answer 17

Low bay

Question 18

2 options for ballasts

Answer 18

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

Question 19

Voltages that can be used with HID’s

Answer 19

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

Question 20

A starter and ignitor are need for what

Answer 20

The striking of the arc

Question 21

What does a HID ballast consist of

Answer 21

Coil assembly, core, and capacitor

Question 22

HID fixture mounts

Answer 22

Ceiling surface-mounted, recessed, or wall-mounted

Question 23

Specialized HID ballasts are designed to operate at what temp

Answer 23

65 degrees Celsius

Question 24

Pole-mounted application factors

Answer 24

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