SPECIFICATION
Emergency lighting shall be provided by using a standard fluorescent fixture equipped with Howard BAL1400 emergency ballast.
This emergency ballast shall consist of a high-temperature, maintenance-free nickel-cadmium battery, charger and electronic circuitry contained in one 13 3/ 8" x 2 3/8" x 1 1/2" white metal case.
A solid-state charging indicator light to monitor the charger and battery, a single-pole test switch, and installation hardware shall be provided.
The emergency ballast shall be capable of operating One or Two 17W – 215W Single Pin or Bi-Pin fluorescent lamps including Standard, Energy Saving, HO, VHO, Circline, U-Shaped and 4-pin rapid-start long compacts in the emergency mode for a minimum of 90 minutes.
The BAL1400 shall have 4.0 Watts of input power, a 24.0 Watt-hour battery capacity, and exceed emergency standards set forth by the current NEC.
The emergency ballast shall be UL Listed for installation inside, on top of, or remote from the fixture, warranted for a full five years from date of purchase.
http://www.howardlightingproducts.com/Documents/SpecSheets/Ballast/Emergency/BAL1400.pdf