1|Page
NALMCO Certified Apprentice Lighting
Technician (CALT) Study Guide /
certified Q&A 2025
1-1
Light output is measured in ...?
a) Footcandles
b) Lumens
c) Watts
d) Electrons-correct-answer-b) Lumens
1-2
Rated lamp life is the time when ...?
a) Lamps reach 20,000 hours of operation
b) 1/2 of a large group of lamps are expected to have failed
c) All lamps are expected to fail
d) It's the best time to group relamp-correct-answer-b) 1/2 of a large group of
lamps are expected to have failed
1-3
,2|Page
The Color Rendering Index is a scale that describes how accurately colors look
when struck by the light from a given lamp. How is the scale defined?
a) 0-100, with 0 being worst and 100 being best
b) 0-75, with 0 being worst and 75 being best
c) 0-100, with 100 being worst and 0 being best
d) 0-75, with 75 being worst and 0 being best-correct-answer-a) 0-100, with 0
being worst and 100 being best
1-4
Which of the following is NOT a typical function of a lighting system?
a) Ballast starts and operates the lamp
b) Lamp produces light
c) Ballast records energy consumption on an LCD display
d) Luminaire controls the direction and intensity of the light
coming out of the lamp-correct-answer-c) Ballast records energy consumption on
an LCD display
1-5
Voltage is the "push" of electricity, which reaches resistance, and the resulting
rate of flow of electric power down the line is called ...?
a) Ballast starts and operates the lamp
b) Lamp produces light
,3|Page
c) Ballast records energy consumption on an LCD display
d) Luminaire controls the direction and intensity of the light
coming out of the lamp-correct-answer-d) The current
1-6
Which of the following is NOT one of the major families of lighting?
a) Incandescent/Halogen
b) Electroluminescent
c) High-intensity discharge
d) Fluorescent-correct-answer-b) Electroluminescent
1-7
The amount of electric power a lighting system draws is measured in ...?
a) Watts
b) Ohms
c) Amps
d) Volts-correct-answer-a) Watts
1-8
A lighting system's efficacy is measured in ...?
, 4|Page
a) Lumens/Watt
b) Amps/Volt
c) Lumens/kWh
d) $/kWh-correct-answer-a) Lumens/Watt
1-9
Which is NOT one of the most important questions we typically need to ask to be
able to understand and compare one lamp to another?
a) How long does the lamp last?
b) How much light does it produce?
c) How much electricity does it require?
d) What is its noise rating?-correct-answer-d) What is its noise rating?
1-10
____ describes the gradual decline in a lamp's light output as it ages.
a) Light efficacy
b) Lamp consolidation
c) Lumen depreciation
d) Hours per start degradation-correct-answer-c) Lumen depreciation
NALMCO Certified Apprentice Lighting
Technician (CALT) Study Guide /
certified Q&A 2025
1-1
Light output is measured in ...?
a) Footcandles
b) Lumens
c) Watts
d) Electrons-correct-answer-b) Lumens
1-2
Rated lamp life is the time when ...?
a) Lamps reach 20,000 hours of operation
b) 1/2 of a large group of lamps are expected to have failed
c) All lamps are expected to fail
d) It's the best time to group relamp-correct-answer-b) 1/2 of a large group of
lamps are expected to have failed
1-3
,2|Page
The Color Rendering Index is a scale that describes how accurately colors look
when struck by the light from a given lamp. How is the scale defined?
a) 0-100, with 0 being worst and 100 being best
b) 0-75, with 0 being worst and 75 being best
c) 0-100, with 100 being worst and 0 being best
d) 0-75, with 75 being worst and 0 being best-correct-answer-a) 0-100, with 0
being worst and 100 being best
1-4
Which of the following is NOT a typical function of a lighting system?
a) Ballast starts and operates the lamp
b) Lamp produces light
c) Ballast records energy consumption on an LCD display
d) Luminaire controls the direction and intensity of the light
coming out of the lamp-correct-answer-c) Ballast records energy consumption on
an LCD display
1-5
Voltage is the "push" of electricity, which reaches resistance, and the resulting
rate of flow of electric power down the line is called ...?
a) Ballast starts and operates the lamp
b) Lamp produces light
,3|Page
c) Ballast records energy consumption on an LCD display
d) Luminaire controls the direction and intensity of the light
coming out of the lamp-correct-answer-d) The current
1-6
Which of the following is NOT one of the major families of lighting?
a) Incandescent/Halogen
b) Electroluminescent
c) High-intensity discharge
d) Fluorescent-correct-answer-b) Electroluminescent
1-7
The amount of electric power a lighting system draws is measured in ...?
a) Watts
b) Ohms
c) Amps
d) Volts-correct-answer-a) Watts
1-8
A lighting system's efficacy is measured in ...?
, 4|Page
a) Lumens/Watt
b) Amps/Volt
c) Lumens/kWh
d) $/kWh-correct-answer-a) Lumens/Watt
1-9
Which is NOT one of the most important questions we typically need to ask to be
able to understand and compare one lamp to another?
a) How long does the lamp last?
b) How much light does it produce?
c) How much electricity does it require?
d) What is its noise rating?-correct-answer-d) What is its noise rating?
1-10
____ describes the gradual decline in a lamp's light output as it ages.
a) Light efficacy
b) Lamp consolidation
c) Lumen depreciation
d) Hours per start degradation-correct-answer-c) Lumen depreciation
