On and off every few minutes.
Learning Track · Module 7: Failure library · Step 53 of 101
| Symptom | The light goes off and on again, or flickers. |
|---|---|
| Cause | Driver thermal protection, a failing driver, a loose connection, a photocell that sees its own light, or low voltage. |
| Check | Measure supply voltage at the luminaire. Check terminals. Check if the photocell faces the light or a reflective surface. |
| Fix | Tighten connections. Replace the driver or photocell. Turn the photocell to face north (south in the southern hemisphere). |
| Prevent | Specify the correct ambient rating. Check voltage at the last pole. |
Sources
- IEC 60364-6 Verification of low-voltage installations
- IEC 61643-11 Surge protective devices
- IEC 60598-2-3 Luminaires for road and street lighting
- Maker installation and maintenance instructions
Changes: 30 October 2026: First publication: guides for Europe, the Middle East, South Asia, and the USA; failure library; tender clause library; comparisons; tools; downloads. See the changelog. Found a mistake? Report it.