These are the bulbs I am currently using:
http://dx.com/p/t10-2-9w-6500k-185-l...r-dc-12v-51371
I did order a couple sets of these ones for a buddy's trailer; just to try them out:
http://dx.com/p/t10-1-9w-6500k-171-l...r-dc-12v-51358
and
http://dx.com/p/t10-2-5w-270lm-13-sm...2v-pair-191356
The first of the new ones seems a little long; but we will see. The second set appears to say it is 50% brighter; once again I'll see when they come in.
And for replacement 1157 bulbs. (Bathroom and outside light)
http://dx.com/p/1157-3-5w-68-smd-led...r-dc-12v-51270