FREE Certified Energy Auditor Lighting Technologies Assessment Questions and Answers

Question 1

When conducting a lighting technologies assessment for a commercial office building, an energy auditor observes that many areas are significantly overlit according to IESNA recommendations.
Which of the following strategies would offer the most immediate and cost-effective energy savings while maintaining adequate illumination levels?

Accepted Answer

Implementing dimming controls and task lighting where appropriate.

Answer

Replacing all fluorescent fixtures with LED retrofits.

Answer

Installing occupancy sensors in all private offices and conference rooms.

Answer

Repainting walls and ceilings with lighter, more reflective colors.

Question 2

An energy auditor is evaluating a large warehouse space currently lit by 400W metal halide fixtures. The client is concerned about high energy costs and long restrike times after power interruptions. Which modern lighting technology would be the most suitable recommendation to address these specific concerns?

Accepted Answer

Light Emitting Diode (LED) high bay fixtures

Answer

High-pressure sodium (HPS) lighting

Answer

T5 High Bay fluorescent lighting

Answer

Compact Fluorescent Lamps (CFLs)

Question 3

Which of the following metrics is crucial for an energy auditor to consider when comparing the energy efficiency of different lamp types, as it represents the amount of light produced per unit of power consumed?

Accepted Answer

Luminous Efficacy (lumens per watt)

Answer

Color Rendering Index (CRI)

Answer

Correlated Color Temperature (CCT)

Answer

Rated Lamp Life (hours)

Question 4

During a lighting audit, an auditor identifies a large common area with consistent daytime occupancy that currently uses manual wall switches. To optimize energy savings, which lighting control strategy would be most effective in leveraging available natural light?

Accepted Answer

Daylight harvesting controls

Answer

Time-of-day scheduling

Answer

Occupancy/Vacancy sensors

Answer

Individual task lighting

Question 5

An energy auditor is assessing a large retail store that operates with long hours and varying customer traffic. The store currently uses older T12 fluorescent lamps. To achieve significant energy savings and improve light quality, which upgrade path would offer the best combination of efficiency, light quality, and control flexibility?

Accepted Answer

Upgrading to LED tubes (Type B – ballast bypass) with integrated smart controls.

Answer

Retrofitting with T8 fluorescent lamps and electronic ballasts.

Answer

Replacing with T5 fluorescent lamps and magnetic ballasts.

Answer

Installing new incandescent fixtures with dimmer switches.

Question 6

What is the primary benefit of replacing existing magnetic ballasts with electronic ballasts in fluorescent lighting systems?

Accepted Answer

Lower power consumption (higher efficacy) and reduced heat generation.

Answer

Reduced lamp flicker and hum.

Answer

Increased lamp life for fluorescent tubes.

Answer

Ability to use incandescent lamps in fluorescent fixtures.