Regarding the "Dual Arc Bulbs" (600 watt HPS and 400 watt MH in same bulb), isn't it hard to cool that monster? The total spectrum idea is intoxicating, but doesn't it generate at least twice as much heat as a standalone 600 watt HPS? I would like to try one, but I'm thinking it would be too much heat for my small grow room, which is 3.5 x 3.5 x 8 = 98 cubic feet. Opinions, please. And thanks.