G2 Emergency LED T8, 15W, 3500K, 4ft With its price point, the G2 emergency T8 is the most cost-effective emergency lighting option for replacing the expensive emergency ballast. During power outage, the emergency T8 automatically draws power from its built-in battery and lasts more than 90 minutes on battery at 420 lm.
This lamp is required to operate on an always-on circuit in order to keep the battery charged at all time. It is double-end wired on line voltage (ballast bypass)..