Greetings y'all from the Great White North. Is this overkill or what? Your input is more than welcome. I have 4 Dutch Haze seedlings on the go right now. Just completed week 2. I have an array of floros (t5 tubes - 34 watt) 6 in total on my babies, within a 4'x4' grow room. What stage will this lighting be effective to? I'm quite knowledgeable about weed biology but this is my first grow. HPS for flowering - right? Thanx.
Those will be great until you switch to 12/12, then put in the HPS. 400 or 600 watter will do for 3 plants. Go with the cheap 400 watter if you are on a budget, or get a nice 600 watt if you can afford it.
Thats sounds pretty good for a 4 by 4 space. Grow them out a little under the floros then you want to switch to at least 400 watts of HPS. Remember the height issue, your plants will stretch while flowering and youll need to keep the HPS a bit higher than the floros because of the heat. Haze will get pretty tall I think. Maybe try buying a switchable ballast which will allow you to use both Metal Halide and HPS bulbs. That way on your next grow you can use the same fixture using MH for Veg and HPS for flower. I think MH has a better spectrum for veg than floros but it may be a little warmer also. Good luck