Big fixture t5 12 bulbs +

[Killjoy]

I know it's has been covered in the past, but here it goes. I have two 72" t5 fixtures , one is a 12 bulb the other a 14 bulb. I've been using leds for awhile and decided to go back to t5s. With that said any good combos out there, looking for 18-20k look.
Also how about the new bulbs on the market, red sea .. etc.
If there is a link somewhere post it, or if you want to chime in with a bulb combo and or a full tank pick to show color , please do so. Thanks