Warehouse-Lighting.com’s 28W 500-lumen T5HO
ballast has a lumen output of 450-500 lumens and AC power input of 2.5 watts.
It can operate one 14W-32W 2”-4” T5 or T8 fluorescent lamp and is also
compatible with most electronic and dimming AC ballasts. It includes a
high-temperature, maintenance-free nickel-cadmium battery, charger and
electronic circuitry in a compact white metal case as well as a solid state
charging indicator light and battery. This product comes with mounting hardware
and a five-year warranty.