i dont have a heat problem but it seems andywhere that would be close enought to but the flouros it would be blocking the MH i was thinkin of waitin till there bigger then runnin the flouros the lenght of the plant so it will have light from above and the sides.....thats why i was worried about putting it under 18/6 i figured it would stress it...would it add to the stress to put it in a hydro set up????......i dont kno how much light it got its a healthy plant just alittle skimpy it has potintal if u rip the stem then smell ur fingers it smells funky! :thumbsup: