help with t-5 ho setup

[fl_izzy]

i have a 90g mixed tank with even clams doing well plus some acros. currently i have 2 vho super r actinics 46.5" and 2 t5ho aquascience 15k 48" (nice suggestion on those to grimm). i want to do away with the vho's and put 4 more t5ho's. does anyone sell a ballast to put 4 bulbs? hellolights sell the retro kits which i have but 2 bulbs per. i do want to keep my 15k but want bluer colors since either my vhos are old or just dont do it. i purchased them closed to new so the guy said but who knows. what choices do i have for 4 more bulbs? and what order to run them? so far the idea anyways is, super r actinic x2, Reef Blue Actinic- Aqua Medic, TRU Actinic, plus my 2 15k aquascience that i already have. by the way i have tru 10k that i removed and put away but they were too yellow for me. i will take any suggestions since i am at planning stage right now. thanks