Ask Ovia: what happens to emergency lighting during a power cut?The column where you get to put your lighting questions to the head of the Ovia lighting business, Mike Collins, and his team of technical experts. Q. WHAT HAPPENS TO EMERGENCY LIGHTING IN THE SITUATION OF A POWER CUT? DOES THE INTERNAL MEMORY RESET? DOES THIS THEN AFFECT THE ANNUAL THREE-HOUR TESTS? Self-test emergency luminaires ...The post Ask Ovia: what happens to emergency lighting during a power cut? appeared first on Professional Electrician.