I still think it depends on how many plants you are growing.

If it is just one or two, I would still go with four lights. That way you can light up the sides a bit more.

On these smaller indoor grows, you can get a lot of bud on the interior branches which can get no extra light once the canopy develops.
HARDDON Reviewed by HARDDON on . does it make a differance? let's say I have a grow room size that will work good with a 1000w grow light. Now the question is, can I use four 250w lights and get the same light output, same results? Rating: 5