sealed grow room 4x1000 watt air cooled light ventilation

Are you planning on drawing air from outside the room too? Are you trying to recirculate?

Hoods are notoriously leaky, a flat plane of removeable glass is about the worst thing you can start with for an airtight container. It always leaks around the edges. Cool tubes or better yet melonhead hoods are easily the best sealed. The problem Is if stinky air leaks and is exhausted. No good.

If you are just wondering about sealing the holes where the air for the lights comes in and out, that shouldnt be hard.

And you can always run more ac and just not vent, but its not practical usually. The new gavitas are supposed to be badass if you are gonna go with non air cooled lights.

 

Yeah, the gavitas seem expensive, but they are pretty bad ass. My buddy got some of the 600s and is pulling almost the same as 1000s with them. He got them for under 300 each, which isnt bad for bulb, ballast and hood, and keep in mind the bulbs last for years, you dont need to change them all the frickin time. Two bulbs a year ads up. If you get the parabolic make sure to get the ones that hold the bulb vertically, way better dispersion. or just dont even bother with the reflector, just buy the socket and cord for 15 bucks, done. I am working on a vertical setup right now myself, super stoked.

 

An 18k btu should be just enough to cool four open lights i would think.

As for the 600s, theres a few things. First off, the gavita is more efficient so it produces more light and less heat with the same amount of energy compared to a single end hps bulb.if you were to put 4000w of gavitas regardless of size you would be getting more light for the same price. The gavita can be ordered with the remote ballast, and the hood comes off, so you can also run them vertically with no reflector which is the way to go. My friends room has 3x 600w gavitas in an 8x10 and it really is surprisingly bright in there.

Now, as for speading out the watts, im a big fan of that myself. Ive been growing dor a while and i can remember the days of bigger is better 1200 and even 1400w bulbs! Always a waste. I spent several years running 750s. Back before xxxl hoods and shit it always worked better for me to have more hoods and bulbs to spread out the wattage. Running large canopies with those smaller hoods you coukd always see dark lines between the rows, only real way to stop it is move the hoods closer, but you get to a point of diminishing returns where if you stick 20 1000w bulbs in tiny hoods in a 10x10 room it doesnt really help your cause.

Now 750s are being phased out though, bulbs are hard to find, ge lucolox is the only good brand still in production, and even lumatek has ceased producion of their 750w ballasts. I have always found 750s to be a happy medium of spreading the watts but still having intensity for nice big colas. With the new big hood race and 750 phase out ive had to switch up some. Now, i went to 1000w first, bigger hoods helping spread, no dark rows anymore which is nice. But.... i have now switched back to 600s. I use 1000w eye hortilux bulbs and just run 600w ballasts. Why? Simple, 1000w bulbs are cheaper, and my theory is they might last longer par wise since than a 600 running at full intensity. Why 600s instead? Well, my electric is limited at my new spot. I can run either 6x1000w, 8x750w, or 10x600w. Honestly ten hoods is gonna give you more room no way around it. I did a first round of 4x1000w in a 10x10 areaand have decided i would rather slap up 4-6 more lights since the area is actually 10x20. I feel 10 or even 8x750 is gonna give better coverage to a 10x20 than 6x1000w hoods, no way around it really. This last round i did 4x600 and while the yeild was smaller, it was easier to manage and the nugs are still very dense, keep in mind some were 4-5 inches from the glass by the time they were done. I am completely confident that i will be able to pull more consistantly with more bulbs.

Sorry for the long winded explanation, lol!

 

Yeah, i just liked the 750s personally, 600s are a little dim, 1000s have hot spots light wise and cost so much more, 750s give good penetration but still free up some wattage for you to run more hoods. I had 20x750s and was able to pull up over 1.5p per light when all was just right. But it all boils down to g/w and your setup and what you want to dial in. Its all about dialing. I have seen people pull over 1g/w with 600s and 1000s, but with different growing methods.

The 750 bulbs are a little more than the 1000w hortilux, so you can still use those, but the 750 is small like a 600 fwiw. I am willing to bet that a 1000w can maintain more par over time than. 600w at full blast, so its a lot cheaper bulbwise. The grow i am comparing was the same exact setup using 1000s first run, then same bulbs even just at 600 the nest round. I pulled less overall of course, but i had way more room for potential gains too, i think i can get up to the 1g/w area with the 600s easier since i am really working with more like 7.5x7.5. Thats a tight squeeze for 8p, six will be easier to do amd will give me enough wattage for a whole extra area the same size and watts.

As for ballasts, lumatek solid state only is my advice. ive seen people talk ish, but i have used all the brands and will only buy lumatek. Did a side by side just recently with phantom and the phantoms are way dimmer. Any aircooled ballast is junk, lets blow unflitered moist air all over the internal electronics, brilliant. I havent bought a lumatek in years either, when they burn out after 3-4 years i go to the store and they give me a new one off the shelf, its beautiful. They will cut the shit out of you, i do hate that, lol.

Bulbs, hortilux is sort of the standard. Cheap for higher end bulbs, digilux is way more. The lumatek bulbs are crap, dont bother with those.