The I32 Fluorescent Emergency Ballast That Allows The Same Fixture to Be Used For Both Normal and Emergency Operation. In The Event Of A Power Failure, The I32 Switches From The Existing Ac Ballast to Operate One Of The Existing Lamps For 90 Minutes In The Emergency Mode. The Unit Contains A Battery, Charger, and Inverter Circuit In A Single Can. The I32 Can Be Used With Most 2'-4' T8 Thru T12 Lamps and 28W T5 Lamps, With An Initial Output Of Up to 500 Lumens For One Lamp, and Features Lamp Selector Leads