Thanks for the replies. Definately things to think about.
I think part of me was wishing people would say everything was absolutely perfect ) but when is that ever the case )

Things that attracted me to this light was the price and also the fact of only using one bulb throughout the grow.
Do you feel a 250w hps would be more suitable for my situation?

Thanks also for the link, going to have a good look through that site now.

I know I have to spend money to get a succesful grow but like most people money is a wee bit tight.

all the best.