looking for hps bulbs, im finding that hydro shops are gona charge me an arm and a leg, as well as 300-400$ for the bulb, ballast, reflectr kit.

owever, i have found em on ebay for approx 150-200 cheaper. are these still good quality?

and i also found this: Lithonia High Bay 400 Watt High Pressure Sodium Lights - Mississauga Buy & Sell Items - Kijiji Mississauga

its a bit of a drive, and the ballasts are 347volts (:wtf however the price is worth it. how easily would i wire a 347v into a statndard 110-120v socket?

ps: what does a ballast do? regular lightbulbs dont need em for thier specific wattages....