the plants you see in the pictures (7 total) are in a 10x20 room (roughly) with 2 400 watt HPS right now. when they were vegging, i had them under 2 400 watt metal halide and they got PLENTY of light ( as you can see)......after those are harvested, ill be cleaning and painting the whole room titanium white, s ill get alot more light by reflection also.