Certified Lighting Efficiency Professional

Exam at a glance

Exam fee

U.S. certification application and examination fee is $400; retest fee is $200; certification renewal fee is $300 every 3 years

Questions on exam

120 multiple-choice graded questions across 11 sections

Duration

4-hour open-book/open-notes exam

Retake policy

Retest fee is $200

Validity

Certification must be maintained every 3 years by filing renewal and accumulating 10 professional credits

Published exam facts, from the official outline.

What’s on the CLEP exam

1. Language of Light and Lighting Efficiency (8-12%)
2. Lighting Quantity and Quality Fundamentals (8-12%)
3. Color, Visibility, and Health (8-12%)
4. Traditional Light Source Lamps and Ballasts and their Operating Characteristics (4-6%)
5. LED Technology and its Operating Characteristics (8-12%)
6. Lighting Maintenance and Environmental Safety (4-6%)
7. Lighting Controls (8-12%)
8. Lighting Audits (4-6%)
9. Lighting Photometrics, Reports, and IES Files (8-12%)
10. Lighting Calculations (12-18%)
11. Financial Analysis Metrics and Calculations (8-12%)

Official exam blueprint domains — your practice bank mirrors this outline.