Bat wing, umbrellas suck. With a 9'x 4' room you should have two 600s case they cover 4x4 each, your 9'x4'. You need two. Or get one xxxl magnum for 170 bucks and hope for the besthi guys.its lee from uk. want to ask what size reflector hood is best for a 2 m x 1.2 m x 2m. i will only be useing 1 600watt hps bulp..do u think parabolic.or bat wing..