I hope that I am posting in the right section, I could not find a specific lighting section, but then again, I easily could have missed it. In any case.
Does anyone have experience with double ended fixtures, specifically the Gavita 1000 or better yet their 600/750 watt version (that I do not believe is available yet in the US)? I think my height, roughly 7', is too low to run the 1000, but I have heard that you can tune them down to 600 watt. Which prompts the question, would it be worth it to buy the 600 watt version, if I can just tune the larger one down? Is my 7' limitation enough to allow me to use the 1000 watt double ended, or even the 600 watt version? I heard you need 36" of clearance for the 1000s, which would make their penetration useless with the size of light + pots + plants. The 600 watt version, as I have been led to believe can be 18" - 24" from the light, which should just give me enough room. I do believe the reflectors may have been designed to be hunger higher, and may have a smaller than desired footprint when suspended from only 7'. Would I switch the reflector, and if so, to which? These lights are not typically aircooled, as I have heard that can affect the efficiency.
With all respect, I appreciate any helpful input, or clearing up about what I have asked and stated. I am in the process of dialing in, and have just begun. Please feel free to criticize (respectfully) any aspect of my grow that you have experience with and could help me to improve.
My setup now is two old six hundred watt hps, I can tailor my room to the size I need, and am thinking of doing three 600 watt hps (hopefully double ended eventually). I currently have six plants one month in flower (in one gal) and six plants one week in flower (in five gal). The smaller pots were a bit of an experiment, and I will be using mostly 12"x12" white squre pots that I believe are aprox 4.5gal. I use roots organic bloom, roots trinity, then mess up all the organic with bloombastic to finish. I give some veg fert the first month or so in flower, slowly weaning them off. The rooms are a little too warm at the moment, 82F, but the air gets moved around decently. The mix I use is Sunshine Mix 4, which I believe is just promix with a little coco and some biotics. I am growing basic kush variations, that are pretty nice, I will try to get a few pictures up..
This is definitely a work in progress. I started before everything was perfect to get things going, and work off the rush. The first test grow was a nice little success for me, but I am sure most of you would have laughed sokay, I would too if it werent mine.
I eventually hope to close the room, use co2 and ac.. but those would be new to me.
I know, I know, so many questions, and I am sure I am leaving many out, no need to answer them all. If you have experience, and are feeling helpful, I would appreciate it in any area.