South Carolina Lighting Control Systems
Technician Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following is the primary purpose of a lighting control
system in a commercial installation?
A. To reduce the number of light fixtures used
B. To optimize energy efficiency while maintaining desired lighting
levels
C. To increase bulb wattage automatically
D. To standardize architectural finishes
A lighting control system is designed to manage light output and
operation efficiently, reducing energy use without compromising
required illumination.
2. What is the National Electrical Code (NEC) requirement for spacing of
occupancy sensors in typical open office areas?
A. 5–10 feet
B. 10–15 feet
C. 6–12 feet based on sensor type
D. 15–20 feet
Occupancy sensor spacing is determined by sensor detection pattern
and mounting height to ensure continuous coverage in open spaces.
,3. In a 0-10V dimming control system, what does the control voltage of
0V represent?
A. Full brightness
B. 50% light output
C. Light off or minimum output
D. Voltage override
In 0–10V systems, 10V corresponds to full brightness, and 0V
corresponds to off or minimum controlled output.
4. Which device is commonly used to manually adjust light levels in a
lighting control zone?
A. Circuit breaker
B. Photocell
C. Dimmer switch
D. Transformer
Dimmer switches allow intentional adjustment of luminaire output as
required by occupants or design criteria.
5. What is the function of a photocell in an exterior lighting control
system?
A. Detect sound levels
B. Sense ambient light to control lighting operation
C. Provide thermal protection
D. Step down voltage
Photocells detect daylight levels and automatically switch lighting on
or off based on preset thresholds.
6. The term “ballast” in fluorescent lighting refers to what component?
A. Light sensor
B. Power outlet
C. Fuse
D. Current regulator for the lamps
, Ballasts regulate current to fluorescent lamps, ensuring proper start
and operation.
7. In a DMX512 lighting control system, what is the primary role of the
controller?
A. To supply line voltage
B. To provide thermal management
C. To send digital commands to fixtures
D. To replace circuit breakers
DMX controllers send standardized digital signals to control lighting
fixtures and effects.
8. What does the acronym PWM stand for in LED dimming?
A. Power Wave Modulator
B. Pulse Width Modulation
C. Phase Watt Matching
D. Primary Wire Method
PWM adjusts the effective power to LEDs by varying the duty cycle of
the pulses.
9. Which of the following lighting control strategies can yield the
greatest energy savings in a mixed-use building?
A. Manual switching only
B. Timer on/off control only
C. Integrated occupancy sensing with daylight harvesting
D. Constant full output operation
Using occupancy sensors together with daylight dimming maximizes
energy savings by reducing lighting when not needed and during
daylight availability.
10. A zone in lighting control terminology refers to:
A. A single lamp
B. A type of transformer
Technician Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following is the primary purpose of a lighting control
system in a commercial installation?
A. To reduce the number of light fixtures used
B. To optimize energy efficiency while maintaining desired lighting
levels
C. To increase bulb wattage automatically
D. To standardize architectural finishes
A lighting control system is designed to manage light output and
operation efficiently, reducing energy use without compromising
required illumination.
2. What is the National Electrical Code (NEC) requirement for spacing of
occupancy sensors in typical open office areas?
A. 5–10 feet
B. 10–15 feet
C. 6–12 feet based on sensor type
D. 15–20 feet
Occupancy sensor spacing is determined by sensor detection pattern
and mounting height to ensure continuous coverage in open spaces.
,3. In a 0-10V dimming control system, what does the control voltage of
0V represent?
A. Full brightness
B. 50% light output
C. Light off or minimum output
D. Voltage override
In 0–10V systems, 10V corresponds to full brightness, and 0V
corresponds to off or minimum controlled output.
4. Which device is commonly used to manually adjust light levels in a
lighting control zone?
A. Circuit breaker
B. Photocell
C. Dimmer switch
D. Transformer
Dimmer switches allow intentional adjustment of luminaire output as
required by occupants or design criteria.
5. What is the function of a photocell in an exterior lighting control
system?
A. Detect sound levels
B. Sense ambient light to control lighting operation
C. Provide thermal protection
D. Step down voltage
Photocells detect daylight levels and automatically switch lighting on
or off based on preset thresholds.
6. The term “ballast” in fluorescent lighting refers to what component?
A. Light sensor
B. Power outlet
C. Fuse
D. Current regulator for the lamps
, Ballasts regulate current to fluorescent lamps, ensuring proper start
and operation.
7. In a DMX512 lighting control system, what is the primary role of the
controller?
A. To supply line voltage
B. To provide thermal management
C. To send digital commands to fixtures
D. To replace circuit breakers
DMX controllers send standardized digital signals to control lighting
fixtures and effects.
8. What does the acronym PWM stand for in LED dimming?
A. Power Wave Modulator
B. Pulse Width Modulation
C. Phase Watt Matching
D. Primary Wire Method
PWM adjusts the effective power to LEDs by varying the duty cycle of
the pulses.
9. Which of the following lighting control strategies can yield the
greatest energy savings in a mixed-use building?
A. Manual switching only
B. Timer on/off control only
C. Integrated occupancy sensing with daylight harvesting
D. Constant full output operation
Using occupancy sensors together with daylight dimming maximizes
energy savings by reducing lighting when not needed and during
daylight availability.
10. A zone in lighting control terminology refers to:
A. A single lamp
B. A type of transformer
