First Grow?????

Hey what up people? This is my first post so i guess that makes me a noob. Anyway let me get to my questions. I started germinating 6 seeds in rockwool cubes stored in one of the grow domes or whatever u call them on Saturday Oct. 18th, i check today on Oct. 21st and 2 have sprouted so far. I have them under a 400w Metal Halide light which is on 18hrs & Off 6. So my question is, How long should i keep doing this? Do i need to keep the inside of the grow dome moist? Should i add Nutes? At what time should i plant in soil? This is my first grow so i'm looking for all the help i can get.

definetly got enough lighting...sounds like a good set up tho get some pics. whats your ventilation like and how close is the light?

The only ventilation i have is the vent thats already in the bathroom for when u take shits. Don't know if thats gonna be good enough. And eventually i am gonna have to tack le the smell. My Light is about 16 inchs away.