we cant say how much light you need, because we dont know the size of your grow space ... you could have way too much light and heat there, or, not nearly enough ... in general, a 400-watt covers 4ftx4ft, etc , so assuming youre devoting a minimum of one sqare foot per plant, two 600 watters should be enough for about 18-20 plants, I would personally give them a bit more room for less plants, larger pots, for bigger buds .... hope this helps ...
the image reaper Reviewed by the image reaper on . 800watt Dual Spectrum Light Would a 800 watt dual spectrum light produce big buds. It is just 2-400watt lights that is why I am aasking the question. It will produce bigger buds than 600watts and small buds than 1000watts right. How many PLANTS WOULD ONE 800watt light cover. Rating: 5