DUDE r u seriously gonna try and grow off of THAT light. Good luck, i would be suprised if they made it past a month, first off they r gonna stretch....second off there is no way in hell that that light puts out enought lumens for what you need, and third, GET THEM OUT OF THE COOLER, pinch a few bucks out of your arse and get a few pots to put them in, they are a weed man and they spread there roots like one, when ppl grow multiple plants in one container and then try to seperate them they usually end up killing there plants cause they have to tear the two plants roots apart. This setup is no good man, try again, all over from scratch in pots. what happens when they out grow that cooler.LOL o boy
also if you r gonna try and frow under that light, your gonna need about 6 of them per plant, AT A BARE MINUMUM!!! And you will also have to deal with the heat they put off, so get a fan, also how you gonna maintain humidity? also since you are going the CHEAP route, get a few CFLs you will thank me later.
Dont beleive me, do a search on "stretching"
this is what your gonna end up with if you continue to grow under these conditions.
Yea drainage is gonna be an issue as stated b4, but I CAN NOT BELIEVE no one said anything to you about your lights. Check out my gallery, WAAY old but you will see my setup. These were from about a month ago, right after i transplanted them, since then they are 3 feet tall, and just went into flowering this past monday, out of the 8 i had in veg, 7 have sexed already...ALL FEMALE, what r the odds of that. LOL but see the flouresants i got in there? your gonna need a few of those if ou want to be remotely successfull, since you are going the cheap route. HOnestly though, have you thought this through? what about the stencth that will form, what nutes are you gonna give your girls? this isnt something to take lightly man, its an art and a science for some (ME)