Lighting

Question 1

What light source is considered to have the highest efficiency

Answer 1

High-pressure sodium

Question 2

What is meant by inverse square law

Answer 2

Two times distance equals A quarter Lux

Question 3

How is light produced in incandescent lamp

Answer 3

Heat of filament equals light

Question 4

Incandescent What percent is heat what percent is light

Answer 4

90% heat 10% light

Question 5

What type a lamp provides the best color rendition

Answer 5

Incandescent

Question 6

What material is the filament normally made of

Answer 6

Tungsten

Question 7

High pressure sodium life

Answer 7

24000 hrs

Question 8

Metal halide hrs

Answer 8

15000hrs

Question 9

Mercury vapour life

Answer 9

Best 24000 hrs

Question 10

Low pressure sodium hrs

Answer 10

18000 maybe brighten by 5%

Question 11

Fluorescent hrs

Answer 11

7500-20000

Question 12

Incandescent hrs

Answer 12

1000hrs

Question 13

Low pressure sodium colour

Answer 13

Yellow

Question 14

Mercury vapour colour

Answer 14

Blue white

Question 15

Metal halide colour

Answer 15

White

Question 16

High pressure sodium colour

Answer 16

Orange

Question 17

Incandescent cri

Answer 17

Best

Question 18

Fluorescent cri

Answer 18

Very good

Question 19

Low pressure sodium cri

Answer 19

Worst

Question 20

Metal halide cri

Answer 20

Best hid

Question 21

High pressure cri

Answer 21

Worst hid

Question 22

Incandescent %

Answer 22

Worst

Question 23

Low pressure sodium %

Answer 23

Best

Question 24

Mercury vapour %

Answer 24

Lowest hid

Question 25

High pressure sodium %

Answer 25

Best hid

Question 26

Low pressure start time

Answer 26

10 min

Question 27

Mercury vapour start time

Answer 27

3-7

Question 28

Metal halide start time

Answer 28

5-7

Question 29

High pressure sodium start time

Answer 29

3-4 min