Quote Originally Posted by gus738
i need inline fans like the 6" or the 8". but does the exhaust have to match or exeed intake amount? also as far as the led what panel would you point out to ? is it ideal only for veg or that panel works for flower as well? does the distance or intesensity affect hugely ? i thought this was somewhat of an issue, since i lost what i wrote on the rest of the led i'll wait for your response thanks guys....
I can't answer your HID questions. Sorry. Your intake should be 1.5 x the out take. Someone please fact check but that is what I recall. Get a fan speed controller on you shopping list. This will allow for micro adjustments. Check these sticky for detailed instructions on fan size. This one is good: Fans - not just blowing hot air but this one is more appropriate in terms of assessing fan needs: Noob's guide to growroom set-up. See chapter 2 for the fan discussion about half way down the first page. It gives a measure for calculating needs. And those two stickies are excellent for all kinds of setup information. Recommended reading

As for LEDs, there are a number of people here doing LED grows. I'll be one of them shortly. See moody420 who just started a grow. See str8outtaweed who has done a number of all LED grows. And there are others. Just look at some threads going about LED and you will find them.