In my opinion your main problem in the flower room is the fact that you are using a 1000 watt Metal Halide and two 400 watt HPS. You have 1800 watts of poor light for large scale flowering, IMO. The 400 watters will not give you adequate penetration for big, dense buds, and the MH is probably the wrong spectrum for flowering. Replace all of those lights with two 600 watt HPS and you will see better results for less electrical costs, IMO.veg room 6x6.5x7.5 flower room same lighting in the veg room i have 6 cfl lights for the babies 6 for two mothers that i kept from the first grow. 6 for the seedling section and 6 for my aeroponic cloner. flower romm has 2 400w hps and a 1000w mh room temp with the lights off 68 degrees with the lights on 77-79. hum. 35-45 never more or less. drip system for the moms and babies ebf for the ladies. started with some really really really good mid grade bag seed and the first grow the hydro grown bud was not as good as the bagweed and i only got about 1/4 oz per plant? i use co2 with a climate control system with a co2ppm monitor> the atmosphere is not my problem. air flow - hym - temp- odor is under control. why did my bud not even come close to the looks or bulk that i started with. in theory i thought i could make something good better?
Dude already said his room was adequately cooled, and an exhaust fan will suck out the CO2 that he's using as well. If it's properly ventilated the lights will be isolated from the room with cool tubes and ducting, and the room itself will only ventilate if the environmental controller detects that it is too hot (while shutting off the CO2).whatever your problem is, I don't think it's due to the fact that you are using a 1000 watt MH in your lighting mix, all the pros mix both hps & MH spectrum lighting in their flowering stage, and I know stinkbud would back me up on that because he uses both, check out his article in high times.. if anything I would replace your 2 400 hps with a 1000 watt hps, and keep using the MH. I have had great results using both MH and hps together...
My question for you donpablo is, do you have air cooled reflectors hooked up to an exhaust fan sucking the hot air out of your grow room?
Ya you're right. A full spectrum is better. In fact that's what I use myself. I was thinking he is growing in a much larger scale. That's why I suggested the 1000w Hps. A lot of times the reason for small quantity is because not enough light penetration.Dude already said his room was adequately cooled, and an exhaust fan will suck out the CO2 that he's using as well. If it's properly ventilated the lights will be isolated from the room with cool tubes and ducting, and the room itself will only ventilate if the environmental controller detects that it is too hot (while shutting off the CO2).
I agree that full spectrum is best; I just think he's got it wrong. The 400 watt HPS providing the "flowering" spectrum is not powerful enough, and the MH is too powerful for what it's doing.
He's only growing in a 6X6 room, and I'm sure probably only 4X6 of it's being used, and you want him to throw in another 1000 watt light? I agree that he needs a more powerful HPS, but if he's doing a SOG (and not growing trees) then two 600 watt full-spectrum HPS will give him better horizontal coverage and good enough penetration to pull a zip a plant with a good strain and CO2, for half the electrical costs.
Just my opinion...