I would just like to get your opinions on the ATI powermodule vs the Geisemann Matrix? A lot of guys on international forums seem to think that the ATI is better because of the cooling fans prolonging the life of the bulbs and maintaining high par readings opposed to the Geisemann but I would just like to hear your opinions and experiences. The ATI is slightly cheaper than the Geisemann. Both will have 8 T5's with varying colours. Also how do you rate the bulbs of each brand?