Whats the purpose im currently running autoflowers but i plan to run photoperiods would anyone know if the 1000 watts is prefered for photos or would the 750 wants be plenty ? Im also wondering if getting a 10x10 tent for the 1000 watts would be better than the 750 or if i would wanna pack the 1000 watts into a 5x5 tent sorry just curious to the actual purpose for the 1000 watts over the 750 ty for any answers.
4 Likes
How much do you need to grow every ~90days? You should be getting 4 ounces+ from each auto currently right? Multiply your current space and watts per plant by the increase to what you are trying to buy…that’ll get you started for a place to discuss from.
4 Likes
Ultimately comes down to what you expect to pull out of the 5x5. In most scenarios a true 750 led light running at even modest efficiency is plenty for a 5x5. No single light I’m aware of will flower a full 10x10. You have to remember this is 4x the size of a 5x5.
7 Likes
You can expect at least the same results with photos as you got with autos, if not better, with whatever setup you have.
That’s if nothing changed but autoflower seeds to photo periods. Photos can veg longer and be trained more aggressively, but any difference in light intensity requirements is so small its not worth much consideration…
Sizing the light to the growing space you want to light up is a better approach.
Haveing an even spread of light is almost more important then high power/intensity though proper intensity and spread are kinda 2 sides of the same coin.
1000w is not enough for a 10x10, it would take 4 lights to get an even spread of light weather it was 4-1000w or 4-750w.
I run a 720w light in a 4x6 tent and it does well.
The simple answer is a few ounces at harvest time is the difference.
Idk exactly how to put a number on it, but I don’t see there being much difference if any, that is if only the light changed from 750w to 1000w.
Now that’s not to say that the change couldn’t make a very noticeable impact if other parameters was also scaled up.
If you ran 1000w you could maybe get par levels up high enough to benefit from higher co2 levels.
But that opens up a hole new can of worms 
As everything has to go up, temperature, RH, tds of nutrients, then you have to figure out a way to contain the added co2 so you’re not just pumping money away and possibly poisoning yourself (if you live in the same building you grow in)
Long story short, 750 in a 5x5 is my choice
Switch to photos and the longer veg time and or training should give you better results with what you have and keep it easy 
6 Likes
ty what a magnificent answer this helped alot i was reading like oh really ok ok like ty for the detailed response this helped me alot.
3 Likes
My first grow i technically got 14 ounces off it but what i could save was only 7.5 ounces my current grow imma try something new and push for 15 ounces tbh.
1 Like
I want to point out that running a 1,000 watt light at 75% power is (IIRC) much more efficient than a 750 at 100%. It should run cooler overall (a bit). It would also give you the flexibility to run higher wattage for something like a sativa in hydro.
Just my 2 cents.
2 Likes