ok i got and hps/mh conversion lamp, finally got it hooked up, I tested it and the ballast started humming and the light started out faint and got quite bright. I turned oit of whil i got some other things together for the cab. I tried turning it back on and the ballast is still hummin but it didnt turn on right away. (i left it on and its been few minutes since i checked) is this something to be concerned about? also i have jus swtiched over from CFLS. I am using a plastic cab , the cfls were cooler but that hps got HOT fast....plus the walls are lined in mylar. on the plus side it is well ventilated by a fan the size of a soccer ball in the lower art fanning the plants and intake and circulating air, I know it works well because I have a topwise fan for exhaust and it could actually move the blades of the exhaust fan without it even being turned on. I am little nervous and would appreciate some help ASAP! thank you so very much -peace Edit:it is on now, but dim and flickerish.....?????