90W of LEDs sounds like an awful lot (some people would say equivalent to 500W - 1000W of incandescent). Can you believe that it is only 'equivalent' to 144W of fluorescent tubes?I don't know what make it was but these appear similar ... http://www.lyco.co.uk/led-light-panel-standard-90w-cool-white-1200-x-600mm.html ... only larger,
Kind Regards, John