Everyone always acts like bulbs are very expensive and LED is cheaper in the long run but I don't think they actually calculate it. I'm not sure what prices you're getting the fixtures for but lets say the T5 is $500 and the Radions are $1500 since you said 3x more. Bulbs per ATI are suggested to be changed 9-12 months. Lets say 8 bulbs at $160 every 9 months for worst case scenario. 1000(price difference)/160(bulb cost)=6.25(replacements) or 56.25 months thus 4.69 years. So after over 4.5 years you still haven't acquired savings and honestly if you're going to run 5 radions you'll use more electricity than one T5 fixture.
I have made up my mine I'm going to go with the sunpower. Now to figure out what combo of bulbs to run
I like 14k-20k. The fixture already has an blue led installed as a bonus.