Mark, I was hoping to reduce the draw on my genny and make it even more quiet. Six of the 150 HPS would put out more lumens than my 8 350 Ultras, which like you said are becoming more difficult to obtain. The 150's will definitely weigh more if I consider the capacitors that I would really need to add in order to lower the amp draw. Seems like some of the guys on Bowfishing Country just rave about their switch over to HPS and I really would love to see what if anything I'm missing. So I'm kicking around the idea of switching over one side of my lights to the HPS and could then compare the two before switching over completely.