Cheers FreeVenice, I have had good help along the way from Weedhound & Dusto so props to them. :thumbsup:

I bought a 600W HPS on ebay the other night while on a spree so I am waiting for that to arrive. Going to start by switching the light over to the 600W & monitor my temps, if they stay low enough I will add the 250W back in giving a total of 850W HPS. If I can't add the 250W back in then the 600W on its own should be a decent increase.