That is a 7.29 sq/ft area.
What size light, mainly depends on your goals, and how much you want to maximize the grow space.
Plus, the more poweful light that you use, the more, very serious need for Constant Fresh Air Exchange, or you wont be able to use all of the Photons, and the plants, will suffer light stress.
One of, if not the first things I try to figure out, as best as possible is?? How to get a constant fresh air exchange into the space.
I myself dont grow in a tent, and use HID, but in the end, its basically all the same. The more light, the more need, for fresh air exchange, or, you will run into problems, if you try and push the light.
Ever think abot that the SUN, is up to 2100umol, yet, the Outside Ambient CO2 level, is 421ppm, and in 1850, it was 183ppm, and weed grew just fine, under 2100umol of sun.
The reason is?? Even though the ambient air/CO2 level is low, there is so much of it, and with constant replacement, theres no way, a plant could use it all, regardless of ppm.
Going by current data. It is said, an LED is 1/3, more efficient than an HID. Ok.
Going by this assumption, and as stated By
Gavita.
It takes 40w sq/ft, to EQUAL/Replace an HID, which a 1000w
Hortilux HPS, is 62.5w sq/ft. 1650umol
It takes basically 650w, to replace a 1000w HID/
Hortilux HPS-Single Ended, in a 4 x 4 area. This is NOT my statement, it comes from
GAVITA, so regardless of anyone wants to debate it, they can go talk to
Gavita.
So, in your basically 7.30 Sq/ft, at 40w Sq/ft, it takes 292w, to EQUAL, the better 600w-
Hortilux HID/HPS. So the 300w recommended above, is dead on.
This is the formula I use, and it keeps it extremely simple. And it comes from a company, that has done Extensive Testing. And, the main thing is, it keeps it extremely simple, and takes out any guessing.. Next thing would be Spectrum-K Rating.
