got a link of this 1 second please
http://www.youtube.com/watch?v=gejy-3PtOOY&feature=related
this one will do but i saw a much more professional set up with a flood drain system
i once crafted one when i was a freshman in high school wood shop class.... off course i had all the tools that i needed but for the inside of the tube i used a drill press for shape i used a sawzall and sanded it down to shape but right when i was finishing i cracked it with the drill press...
well are you going to do a sea of green method because if soo you will most likely need another tent light etc because all of your plants will go into flower
its called the ultimate vapor machine ive had mine for a year comes with extra fuses and it hasnt blown one yet its the shit its a hands free whip and digital you can get them for easily 100 if you go to the right place