400w, 10,000k mh, I've tried using it a few different ways. I have a 4'x6' room with a 600w hps on a mover. When I got the light I had one plant 1 week away from harvest. I pulled the plant to one end of the room and hung the 400 over it. The 600 w light would just bump into it. So, that plant had mh 10,000k constant and hps when the light traveled to that end of the room. I went bare bulb, to use all of the uvb. The plant gets frosty-er within a few days this way. I don't think the weed is any stronger but the only way I have to test it is not really quantitatively accurate. The "bag appeal" I would say was greatly enhanced. That I compared to a previous several harvest's nugs. The next run, using the same cultivar I figured more is better. I put the light in +/- 3 weeks till the end. This I would not recommend. The sugar leaves coming out of the flowers grew freakishly big, the buds didn't firm up, it was still covered with frost. Possibly a technique for extraction crop but not for me. The last plant I harvested had just the mh to finish.(no hps at all) and this works pretty good as well. The weed isn't as frosty looking but when I put it in the tester frequent "brown outs" occurred. I will continue to adjust how I use it and try to figure out what to do and what not to do.
