WorksheetsGas discharge lamps - key facts
Total questions: 10
Worksheet time: 5mins
What is the operating position of a high pressure mercury lamp?
Vertical
Horizontal
Diagonal
Any
How long does it take for a high pressure mercury lamp to reach full brightness?
4 - 7 minutes
6 - 10 minutes
15 minutes
2 minutes
Why won't a high pressure mercury lamp work immediately after it has been switched off?
Because the pressure inside needs to drop
Because it is too hot
Because the pressure inside needs to increase
Because there isn't enough mercury left in it
What is the efficacy of a fluorescent tube?
12 lumens/watt
35 lumens/watt
60 lumens/watt
75 lumens/watt
What are the different types of fittings of a low pressure mercury start lamp? Tick all that apply
Glow start
Soft start
Semi resonant
Low frequency
High frequency
How much power does a CFL use when compared to an incandescent lamp?
1/8th less
1/3 less
1/6th less
1/2
Even though they are more expensive, what are the cost savings of a CFL over an incandescent lamp?
7 times the purchase price over it's lifetime
3 times the purchase price over it's lifetime
5 times the purchase price over it's lifetime
10 times the purchase price over it's lifetime
What is the CRI rating of a metal halide lamp?
65-80
85-96
43-57
59-79
What are the applications of a metal halide lamp? Tick all that apply.
Residential security lighting
Street lighting
Sports Arenas
Car headlamps
Indoor domestic use
What type of light does a fluorescent lamp emit?
Infra red
Ultraviolet
Phosphorescence
Yellow
