You really want your whole plant to never drop under 70 degrees. Make sure you lift your pots up off the ground (maybe on a pallet or something, you can usually snag one from a walmart parking lot), so that the concrete doesn't make it even harder to keep warm. I'd recommend using a MH, or HPS...
18/6 is for veg, and 12/12 is to start flowering, after you start 12/12 your plants will start to show sex within 2 weeks.... When you start to flower all depends on the size of your plant, some strains can triple size during flowering so keep that in mind.
I totally agree about the lights, and you are going to need to be able to adjust the hieght of your lights. Also I'd recommend active intake over passive any day.
I'm seriously LOLing, literally, and on forums I don't find myself doing that too often. Why don't you smoke less weed, come back to this planet, then start posting on RIU?
Yeah definitely, personally I think his cunt of a girlfriend poured bleach on his plants, but I guess only time will tell, the truth is always revealed though. I've been gardening for a majority of my life, and grow almost all of my own food. I'm a firm believer that if you listen to your plants...
I've shot guns high and sober, and I definitely prefer high. I have a kel tec sub 2000, a smith & wesson 9mm, and a the glock 23 .40 cal, I love nothing more than taking some fat bong rips and going to the outdoor shooting range :)