Hi Guys, I'm trying to build a cob grow system for my small grow room, but I'm financially embarrassed. It's only 2 x 3ft in size, so I was looking at something around the 200-300w range. With this in mind, could I build a cheap diy cob system with 12v drivers and chips, or do I need to stick to 36v DC ? Many thanks, as always. Happy growing !!