Back in the first days of LEDs we used to call them a hype. Now I am afraid to say that i still use hps like i might get stonedEither if those would work in a 3x3. Get as much light as you can. If nothing else, hps lights are cheap if the heat isn't an issue.
Bubba
I have grown some really nice weed with a 4ft 8Tube HOT5 system. Puts out 40,000 lumens.
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