Practice question

What happens to the efficacy of an HPS lamp as it ages?

  1. Efficacy increases over time
  2. Efficacy remains constant throughout the lamp's life
  3. Efficacy decreases as the lamp ages due to lumen depreciation
  4. Efficacy fluctuates randomly

Answer: C — Efficacy decreases as the lamp ages due to lumen depreciation

The correct answer is shown above. Try the full quiz for additional practice.

Practice more: IMSA Roadway Lighting I Practice Questions - IMSA Roadway Lighting Technician Level I Certification Exam Exam →