If you can find the right bulbs then use those. When I did mine, I took the bulbs out of a spare 88-89 cluster, bought the right ones at NAPA, and then found that they were different than the 91 cluster in my car. Since I couldn't find the right ones immediately, and I had the cluster out, I put a thin coat of red engine paint on the bulbs. If you replace/paint all the bulbs with red, the needles will show up red at night too. I haven't seen any good-looking clusters where the actual needles were painted. Whether or not it's brighter is personal preference. I like mine dark, I keep the dimmer all the way down always, and the red makes it a little darker too.