I have a few plants in my flowering room at different flowering times. I am just wondering how far from the plants should this light be? they have been under a good amount of cfls there whole grow.

The heat will be a major difference. Check out a "cool tube" if you can. My 400w kicks up heat....I could only imagine a 1000w. And make sure you can vent the room properly.

Oh...and congratz...you're gonna love the results.

VENTING. lol.

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got the fan just waiting till morning to install (bathroom exhaust fan) venting straight outside have a portable ac unit i will use if necessary. I am pumped to see what this thing can do... not sure of the cfm rating of fan but i would assume with no turns or restrictions whatsoever this will be more than adequete (sp?) I guess i will find out shortly. I know my temps are on there way up right now the room is about 70 if i end up closer to 90 will this cause stress?

sadly when my friend showed up the light was a 400 watt metal halide but i got the price down to 50 bucks for a full set up bulb has less than 100 hours on it... I know the kelvin rating is not ideal for flowering but will this light be better than my cfls? I have it hooked up and it is hot but i am taking care of it. I am planning on buying one of the 3000k MH bulbs but not until next week. I was a little disappointed when i realized my buddy was wrong about the light but 50 bucks for a complete and working 400 watt light was too good of a deal to pass up. It is very quiet hot and blinding bright but much quieter than i thought it would be

Well 400w is ok too. But not as good as 1000w. But still...I wouldnt complain about it...not for $50.

Being that its used....you should be looking into a replacement bulb. Besides...a used bulb wont be as strong as a new one. And Im sure a 400w MH is great. Mine is an HPS. Not sure what kind or how many cfls you're using so I coouldnt say the MH is definitely better. But it probably is. Good luck....and toss some pics up so we can see what you're working with.

I would use both the cfl and MH to give a little more spectrum to your lighting. The MH is more suited for vegging.

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Enjoying the ongoing exierence of acquiring knowledge of this shit....OH YEAH, REP IS MUCH APPRECIATED!!!

i still have 12 of the cfl's in there for side lighting and for the redder spectrum I am surprised with the minor difference in temps I got the hammer drill out to bust me a ventilation hole to the outside (block foundation) didnt make it by the wife...oops probably should have told her i intended on doing this. It would be a very temporary thing while my new little room is under construction so i understand her not wanting me to bust a hole through the wall kind of stupid for only a couple of weeks until I am moved out of that area. I got nervous and basically sat in the room for the first day the MH was hooked up only got up to about 80 degrees at peak. So I will just wait and leave the foundation intact... sorry for the rambling non-sensical thread just tried some of my bud i cut last week very impressed with cfl's