Light Question - Need Help Please

I came across 3 of these on an ad in Houston and they are for $120 for all three. My question is, are these MH ballasts that I can use for grow lights? A picture is below of what the box looks like and it has a little info on the box. Please help as I have to let this guy know by tomorrow. Thank YOU in advance. The only info he had listed in the ad was ....

"(3) 400W metal halide ballast kits. These kits have never been used. They are multi-tap, and still in the box". I talked to him and asked if they could be used as grow lights and he had no idea. Sounded like an older guy who might really not know anything anyways so if anyone can help I would appreciate it. +reps for help.

seems like it would work, is it pre wired or will you have to hook up the light your self. for few more dollars you can get one from htg supply with a hps and metal halide bulbs, already wired and with a reflector. good deal for 3 though but you will still need to buy lights and reflectors