Aleddras 4-foot G4 PRO Emergency LED T8 tube (3CCT Version) sets another industry standard as the first UL924-certified self-testing emergency LED tube. The PRO Series features a patented locking lampholder that secures the tube in place, meeting UL924 safety requirements by preventing removal without a tool. The lamp operates as an energy-efficient T8 during normal operation and can be turned on/off via a wall switch. During power outage, it will last over 90 minutes on battery. More importantly, the lamp will automatically self-test for 30 seconds monthly and for 90 minutes annually, thus meeting the emergency lighting audit requirements with no labor cost.