I have done a LOT of searching and reading on this - both in this forum and the 'net in general. I am preparing to begin a micro grow over the next several months. I have some Blue Widow from HGS, and will start with them. I'll end up with one or two plants after sexing - nothing big, just for personal smoke. I'll probably end up with a box the size of a small vanity cabinet (like a single bathroom sink cabinet). I'm not planning to go with a PC cabinet or something that small. So maybe 18"x18"x36", or something in that general range. I am considering a 150W HPS with a remote ballast outside the cabinet, for heat purposes. I know the lamp puts out the heat and IR as well, and I'll have to ventilate well. Also, I realize I cannot get it too close to the plants (6-8 inches?). So my question is this: Is it better to use CFL's (probably four total - two 42W and two 26W) since I can keep them within an inch or two of the ladies? If I go with the HPS, I have to keep it higher for sure. Also, if the plants stretch too high I'm screwed due to the small space. I will most likely LST these to maximize efficiency. I've seen some damn fine grows with straight CFL's in this subforum. I'm just wanting personal smoke, not bud porn nor to sell, so I don't need to get crazy with it. I do, however, want maximum efficiency from this and safety too, if the fans were to die. All comments are apppreciated! This will be my first indoor grow.