I had many bulbs burnt out in my cluster when I bought my Jeep. About 11 total. That included some of the switches and stuff, but mostly behind the gauges.
I swapped out all of the bulbs, not putting caps on the new bulbs. I'm not sure I like the idea of putting rubber caps on the lightbulbs. Anyway my cluster is bright, and white. Maybe the blue tint from the caps was nice, but, you might want to go this route. I can't say if it's any brighter or not than if all of the bulbs had blue caps (well, I'm sure it is) considering most of my gauge bulbs were burnt out when I replaced them all.
The LED looks good, though. They are just the bulbs, right? I remember seeing a strip of colored lights. I think it was on gojeep's website....
But those LED's just fit in the standard bulb sockets?