Lights OUT (MMS-ADV-50) – Multi-Message SignThe Lights Out (MMS ADV 50) multi message sign is a 600 600 millimetre traffic yellow panel designed to warn motorists that traffic signals ahead are not operating. Commonly used during power outages, roadworks, or signal maintenance, this sign provides advance notice for drivers to approach intersections with caution, give way as required, and proceed safely through uncontrolled junctions. Manufactured in compliance with Western Australia Government