L.e.d

This might sound snooty but it's the wattage that the manufacturer recommends for YOUR grow area. As in coverage area.
 
Man, that's going to be expensive upfront to buy good lights.. Then technology will leapfrog by this time next year. I'd stick with HID although LED is so tempting. The CMH lamps have become pretty affordable and are pretty efficient. There is a 630w CMH now.

Best...
 
Sorry about that it's a 8x6 for flower and 4x6 for veg
Rectangular space... find a brand you like. Check out what they recommend. It's not alwYs quite the same. Plus I would go with several smaller lights at that size as well.
Plus you got the blurples, the cobs and all sorts of different led.
 
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