Okay, I guess this may be a beaten horse question but I have to know. Every time I've seen a light spectrum graph, they say that 5000K is daylight at noon. The daylight light of my Aquapod is 6500K and if I recall correctly the Actinic light is 10000K but don't quote me on that portion. Now why do is it necessary to have a 10000K to 20000K light if you also utilize actinic lighting? I've noticed that most of the actinic's are somewhere around 10000K. This question arrizes because you can get the ballasted screwin flourescent lights at anywhere from 4000K to 6500K. Check www.1000bulbs.com . I looked because this was possibly a way I was going to go just utilized the 48" light fixture to put two actinic lights as on top of about 4 85 watt screw ins. They have up to 150w but I didn't think that I needed one that big since their light output is higher than that of their actual wattage.