I got mine on their grower feedback program for 1/2 off and liked it so much, I bought another one. I ran it in a small tent(2.7ft. x 2.7ft. x 6 ft.) put 3 photo plants in 5 gallon soil pots, and had the side of the tent bulging out like someone had farted in there. I love the way in stacks the nodes!!! I am not too sure about the uv bulbs working, for I have super frosty nugs anyway with the flower additives. The secret......Sugaree and snow storm!!! The plants seem to drink that mixture up!!! I ran 2 plants with it, and 1 plant without it, and the two with had twice the tricome production.