It's a magnetic HPS ballast, that has a UL and ANSI rating....:thumbsup:..its better than digital ballasts, which are unsafe IMO.

It comes with a MH conversion bulb, that you would use first for vegging. The HPS bulb would used for flowering.

There might be a problem with reflector fitting inside the closet, if you needed to close it all the way.

I use a 400HPS in my closet too, about the same size. You HAVE to have a system of cool air in, warm exhausted out.

Some strains stink worst than others. My WW's stink to high heaven. Enjoy.
Dutch Pimp Reviewed by Dutch Pimp on . lighting/Growroom/smell ?? hey guys i have a few questions about a lighting and a grow room. i want to start buying some equipment and was wondering if this light is good enough or if there is a different ballast/bulb i should buy thats better for a 400w system. 400 watt SWITCHABLE GROW LIGHT w HPS Sodium + MH Halide - (eBay item 180170964236 end time Nov-15-07 19:00:00 PST) also a question about a grow room. what is the smallest room you can use to create a grow room with 400w light?? I have a 2.25w x 6.5L x 8h Rating: 5