I was going to buy a 400 watt HPS light from a hydro online store when I had an idea. I looked into just buying the components of the HPS ballast and then the bulb. I found a site that sells them but I was wondering if this is all I need for a functional 400 watt HPS system? I think I may have to add a cord and socket to the ballast but it's alot cheaper in the long run.

Is this all I need?
Ballast (needs cord)
http://www.bulbs.com/eSpec.aspx?ID=9...(HID)+Ballasts

Bulb
http://www.bulbs.com/eSpec.aspx?ID=8...Discharge+(HID)

p.s. I wont need a reflector since Im growing in a small area.
bud_munkey808 Reviewed by bud_munkey808 on . Building a HPS is cheaper? I was going to buy a 400 watt HPS light from a hydro online store when I had an idea. I looked into just buying the components of the HPS ballast and then the bulb. I found a site that sells them but I was wondering if this is all I need for a functional 400 watt HPS system? I think I may have to add a cord and socket to the ballast but it's alot cheaper in the long run. Is this all I need? Ballast (needs cord) Rating: 5