yo, ok so I'm using a 400 watt MH for veging these things. You're probably right about the soil as well, its a mixture of organic outdoor potting soil, perlite, peatmoss and miracle grow potting soil. We're using advanced nutrients micro, grow, bloom, and growth excell. Some of the seeds are bag seed, the one who's doing ok is actually a seed from another grower, NL #4. This is my first grow so I'm very intersted in any corrections info etc. Do you think I should transplant them into bigger pots? Other than that, we actually have one of those glass tubes over the bulb and one fan that pushes air out. It used to be much better before the other fan broke, but now that you mention heat stress I'll replce that right away. Unfortunately these babies were not planned out the best and have undergone copius amounts of stress. We're currently looking for clones to essentially start over. Hopefully a few will be salvagable from this bunch however. Many thanks.