I currently run 4 ViparSpectra 300W equivalent (I think like 125W actual draw) units in my Flower tent and 2 in my Veg closest. I have been very satisfied with all my results for $90 per light. Not much excess heat, producing a great looking crop, cheap up front and monthly. Not saying there are not better options out there obviously there are but this is what I use and it has been doing well.