IRL (In Real Life, as apposed to online), where would I buy a cheap 400w hps bulb only? There are no hydro stores in my area, so i have to find one at someplace like lowes or home depot.
you will need to find a wholesale lighting store in your area and hope for the best. they likely won't have horticulture bulbs like agros or hortiluxs tho.
oh, this is great news, gonna call the local home depot. Yeah, what i was using before is the regular hps. I bought a fancy bulb with a built in reflector, but it's too fat for my cool tube.