315w CDM Euro Reflector Lighting Kits
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Yes you could run two 315w kits in a 1.2m2 area. Unfortunately you would not lower the temperature compared to your current 600w set up as your are going to be running 630w in total so the heat produced would be basically the same. There would however be several benefits; you will certainly be able to increase your yield from your current 600w setup as the 315w lamps have a greater PAR output. 630w CMH lighting is the equivalent of around 900w HPS lighting in terms of PAR output. Your quality will also be hugely increased due to the full spectrum of light and increased UV-A and UV-B.