(NAILD) Certified Lighting Installer (CLI) The CLI exam tests how deeply you understand photometry fundamentals—including luminous intensity, illuminance, and color rendering index—alongside practical installation codes like NEC Article 410 and UL 1598 standards. You’ll need working knowledge of LED driver selection, thermal management in fixtures, and load calculations for mixed voltage systems.
| Exam Name | (NAILD) Certified Lighting Installer |
| Exam Code | CLI |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
