the bulbs cannot be compared. The ATI Blue plus bulb is a very high par bulb. UVL 454 is the closest in color but not the same par. UVL super actinic has low par but better then ati pure actinic. The ati aqua blue is a very white bulb and all of UVL daylight bulbs have a lot of red in them which make thier color very pink instead of white. The red spectrum is a good addition but to much will make your tank look odd. UVL actinic white is thier most popular bulb and for a good reason, high par and a tint of red.
The best thing to do is to mix these bulbs. You are not going to get a great color from the UVL bulbs and you are going to be missing red with just ati bulbs. Here is my fav combo on a 6 bulb fixture.
ATI BLUE X 2
UVL SUPER ACTINIC X 1
UVL ACTINIC WHITE X 1
ATI AQUA BLUE X 2
If you want even more par drop the actinic and add another blue plus.
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