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NALMCO CERTIFIED APPRENTICE LIGHTING
TECHNICIAN (CALT) STUDY GUIDE REAL EXAM
LATEST 2025/ 2026 UPDATE | 100% SUCCESS
1 - 1 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 - 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
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 White-light LED is produced by: a) Combining blue LED and a phosphor b) White LEDs c) White lensed luminaires d) White-light LED is not possible - correct answer - a) Combining blue LED and a phosphor
b) Ohms c) Amps d) Volts - correct answer - a) Watts 1 - 8 A lighting system's efficacy is measured in ...? 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?
____ 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 1 - 11 A lamp with a very low color temperature is considered ...? a) Warm light source (reddish) b) Neutral light source (white) c) Cool light source (bluish) d) Energy-efficient - correct answer - a) Warm light source (reddish) 1 - 12 A lamp's color rendering ability describes how well it can relatively ...? a) Prevent color shifting over time b) Raise color temperature over time
In incandescent lamp typically converts _____% of its electrical input into light output. a) 10-15% b) 20-25% c) 30-35% d) 50% - correct answer - a) 10-15% 2 - 3 Incandescent lamps are rated to provide only ___ hours of service life, so when we want an incandescent lamp but we want it to last longer, we can choose a long-life incandescent lamp, which provides ___ hours of service life. a) 2000 ; 4000 b) 1000 ; 4000 c) 750-1000 ; 1500- 3000 d) 800-2000 ; 2000- 4500 - correct answer - c) 750-1000 ; 1500- 3000
Rough service lamps are resistant to ...? a) Color shift b) Line voltage variations c) Shock and vibration d) Wide range of ambient temperatures - correct answer - c) Shock and vibration 2 - 5 Clear incandescent lamps are a ...? a) Point source b) Linear source - correct answer - a) Point source 2 - 6 Which of the following is NOT an advantage of incandescent lamps? a) No ballast required b) Lowest initial cost c) High energy efficiency compared to fluorescent d) Easy to dim - correct answer - c) High energy efficiency compared to fluorescent
a) Uses a line-voltage ballast b) High efficiency c) Crisp, white light d) Compact size - correct answer - a) Uses a line-voltage ballast 2 - 10 A PAR lamp is an example of which, most specifically, of the following? a) Rough service lamp b) Capsule lamp c) Double-ended linear lamp d) Reflectorized lamp - correct answer - d) Reflectorized lamp 2 - 11 Which of the following is NOT a halogen lamp base? a) Single-pin b) Bi-pin c) Double-contact d) Screw-in - correct answer - a) Single-pin
If we see 75PAR30/HAL/SP10 as a lamp designation, which of the following statements do we know to be true about the lamp? a) 30W b) 10W c) 3 3/4 inches in diameter d) 9-3/8 inches in diameter - correct answer - c) 3 3/4 inches in diameter 3 - 1 The best way to describe an energy-efficient lamp is one that ...? a) Produces less light and saves energy b) Last longer c) Provides better color rendition d) Produces more light per unit of consumed energy - correct answer - d) Produces more light per unit of consumed energy 3 - 2
d) A key - correct answer - a) A ballast 3 - 5 Which of the following is not an advantage of a fluorescent lamp? a) Flexibility b) High efficiency compared to incandescent c) Fast starting d) Lamps can last beyond 90,000 hours. - correct answer - d) Lamps can last beyond 90,000 hours. 3 - 6 On a parallel circuit, if one lamp goes out, the other lamp will ...? a) Fail to light b) Continue to operate normally c) Light only dimly d) Experience severe end blackening - correct answer - b) Continue to operate normally 3 - 7
What is the diameter of a T8 lamp? a) 0.5 inches b) 5/8 inches c) 1 inch d) 1.5 inches - correct answer - c) 1 inch 3 - 8 An instant start F96T12 lamp is how many inches long? a) 9 b) 12 c) 96 d) 48 - correct answer - c) 96 3 - 9 In a lamp code, "T" means the lamp is ...? a) Circular b) Tall c) Tubular
If somebody says, "That's a T5HO lamp," what would we know about its light output? a) Produces more light than a T b) Produces less light than a T c) Light output degrades rapidly compared to T d) It produces the same amount of light as a T8 lamp - correct answer - a) Produces more light than a T 3 - 13 Some compact fluorescent lamps have bi-pin or 4-pin bases, and others have screw-in bases. Which of the following do we know to be true about CFLs with screw-in bases? a) They have a warm color temperature b) They are shatter-proof c) They are preheat lamps d) They are self-ballasted - correct answer - d) They are self-ballasted 3 - 14 A ballast is required for all lighting systems except ...? a) Fluorescent
b) Metal halide c) Incandescent and halogen d) CFLs - correct answer - c) Incandescent and halogen 3 - 15 Which of the following does a ballast do? a) Start the lamp b) Control the current c) (a) and (b) d) None of the above - correct answer - c) Both (a) Start the lamp and (b) Control the current 3 - 16 Which of the following is not a fluorescent ballast type? a) Preheat b) Rapid start c) Instant start d) High pressure sodium - correct answer - d) High pressure sodium
Electronic ballasts offer which benefit? a) Less flicker b) Greater efficiency c) Quieter operation d) All of the Above - correct answer - d) All of the above 3 - 20 If a lamp produces 3000 lumens and the ballast has a ballast factor of 0.90, what is the lamp's light output when operated by the ballast? a) 3000 b) 2700 c) 2500 d) 3236 - correct answer - b) 2700 3 - 21 The most common failure in an induction luminaire is ...? a) Generator / driver b) Vessel/Lamp c) Socket
d) Igniter - correct answer - a) Generator / driver 3 - 22 What is the primary cause of shortened generator life in an induction luminaire? a) Occupancy sensors b) Frequency of starts c) Heat d) High kWh rates - correct answer - c) Heat 3 - 23 Typically, induction luminaires use what type of socket? a) Medium bi-pin b) Mogul c) Edison d) None - correct answer - d) None 3 - 24
