Practice Test Geeks(CLC) Certified Lighting Consultant Practice Test
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Lighting Controls & Technologies Flashcards

7 cards from real CLC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Lighting Controls & Technologies flashcards as text

  1. Which DALI command group allows a lighting controller to broadcast a single command to all ballasts on the bus simultaneously?

    Answer: Broadcast address (255)

    In DALI, the broadcast address (255) sends a command to every device on the bus without addressing individual short addresses.

  2. A 0–10V dimming control signal at 0V typically results in what lamp behavior?

    Answer: Full off or minimum dim level per ballast specification

    A 0V signal on a 0–10V system drives the ballast to its minimum dim level or full off, depending on manufacturer implementation.

  3. In a Lutron RadioRA 2 wireless system, what is the maximum number of devices supported per system?

    Answer: 200 devices

    Lutron RadioRA 2 supports up to 200 devices per system, making it suitable for mid-sized residential and small commercial applications.

  4. Which sensor technology is MOST reliable for detecting fine motor movements such as typing at a desk?

    Answer: Dual-technology combining PIR and ultrasonic

    Dual-technology sensors combining PIR and ultrasonic are most reliable for fine motion, as PIR alone can miss small movements while ultrasonic alone may cause false triggers.

  5. What is the primary advantage of a networked lighting control system over a standalone relay-based system in a large commercial building?

    Answer: Centralized monitoring, scheduling, and energy reporting across all zones

    Networked systems enable facility managers to monitor energy use, adjust schedules, and diagnose faults from a single interface across the entire building.

  6. In DMX512 protocol, how many individual control channels does a single DMX universe support?

    Answer: 512

    DMX512 provides exactly 512 channels per universe, each carrying an 8-bit value (0–255) that can control intensity, color, or other fixture parameters.

  7. A daylight harvesting system in a perimeter office zone fails to dim luminaires even though the photosensor reads high lux. What is the MOST likely cause?

    Answer: The photosensor setpoint is set higher than the measured lux value

    If the controller's target setpoint is above the actual measured lux, the system never activates dimming because it perceives insufficient light.