Read the link del put up, it's a very good source of info.
Also check out
http://www.advancednutrients.com/new2/homeframe.html
go to the grow info links on the left side and click on training videos, watch them and then ask questions if you are still confused. But the time you spend researching will pay big dividends.

As for the light, put your hand at the plant's top level, it it feels hot the light is too close. Move the light so that your hand at plant level is a little warm but still comfortable. Probably be about 1-2ft away depending on ambient temps in your area. Get a thermometer and check the temp at canopy level, it should be about 70-80 deg F.