hey isthislegal-
if you have access to a 240v dryer outlet, they make some fancy lighting controllers that just plug right into the outlet for the dryer, no mess no fuss no tools.some even come with a 25' cord...
http://www.htgsupply.com/viewproduct.asp?productID=55781
or if your a DIY kinda guy you can go to HD, buy a 60amp loadcenter, some #10 romex, and a nema rated male cord end, a breaker or 2, a timer relay, and make it yourself...
since you already now the basics of power, than you know that you could never actually pull 60 amps out of a receptacle, but since your concerned about safety the loadcenter gives you the ability to install GFCI and/or arc fault breakers on all your devices, and have overcurrent protection and groundfault protection right there inside the grow op. the bonus to this is that if you used all 4 slots in the 60 amp panel, then if you had a problem with one device and it kicks a breaker, it wont shut off the other devices on the breakers!
just remember if you do build something like i described, your will always be limited to the wattage of the outlet it is plugged into. a standard 120v receptacle is good for 1440w... and most of those standard receptacles will be on 15amp breakers feeding other receptacles in the same room as well as the lights.