Chapter 9 Electrical System Maintenance - Maintenance ...
LED luminaires: • Clean LED array/lens cover. • Check shields when present. • Replace luminaire every 15 years. HID luminaires: • Relamp every 4 years or replace with LED luminaire. • Clean reflector and refractor. Electrical System Maintenance Chapter 9 WSDOT Maintenance Manual M 51-01.11 Page 9-3 September 2020
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