Again thx Steve the 3 x 600 would be great in the room ive been using,but like I say I dont want to go spending more cash on upgrading my lights (not yet anyways) Doing a little search Ive decided on the 6x3 this time around and hopefully better my yield,my fan efficiency will/should be ample for a good air exchange,so with 18 square feet to play with if ive read the maths correct that Ill be a nice 59wats per s/foot...with room for upgrades

Many thanks.

Bh.