I have two 600w HPS lamps with Cooltubes. I am going to run 6" ducting with an inline fan from the cold air side and blowing air across the socket/bulb and out the other side. The way my lights are positioned is that the lights are side by side so that a run of 4 feet ducting can connect the two lamps. My question is will the hot air from lamp 1 that is being blown out of the tube, through the 4 feet of connecting duct, and blowing across lamp 2 and out the other side going to be too hot and harmful for lamp 2? I'm not sure how clear I'm making this but hopefully someone will understand. Both lamps will be connected by ducting and both will be receiving air from the same fan inline with the ducting. It will go: Fan, ducting connected from fan to cooltube1, ducting connecting cooltube1 to cooltube2, and ducting on the other side of cooltube2 taking hot air out of the room.

The air leaving lamp 1 will be cooler than the heat being put off by lamp 2 by the time it enters the second chamber. Think of this, is there anything between lamp 1 and lamp 2 that will make the air hotter than its origanal source? No. It can only get cooler. No harm will come from setting up your system this way.

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I agree with want my ink. I have 5 cool tubes inline...3- 1000's and 2- 600's...all ventilated by a 630cfm Hurricane 6" inline. Because the air is sourced "clean" and I puish it across the lamps, I then run it into my house and effectively heat a decent area with the spoils. Been doing this for 2+ years and have seen no ill effects on the lamps.

good luck

bt dt

do you use a 6" for the cool tubes as well even for the 1000w. i ask becuase i wonna run four 1000w inline cooltubes and i can't seem to find cooltubes bigger then 6"...

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