Garry is this what you used for your maps?
http://www.v-leds.com/Interior-LED/Dome-Map-LED/White-LED/V-LEDS-HID-WHITE-4-M-p8187987-1-2.html
So I ordered these for my maps to replace the crappy bulbs from superbrightleds
I removed the one led bulb & put in the new v-led & it started smoking then saw a small spark. I removed it immediately & saw that for whatever reason it fried the jacket wrapped just below the heat sink & the connector. So I put in the other v-led bulb in the same socket & BAM that thing lit up. You could land airplanes w/that! Ok slight exaggeration. No idea why the 1st one fried but I took a couple of pics of the bulb & emailed v-leds. They shipped out a replacement right away & it should arrive today. Can't wait to get it in. There is a HUGE difference between the 2 bulbs. Right now I have a v-led bulb in one map & the superbrightled in the other. The superbrightled is pathetic. Now I gotta swap the switched domes.
Those are 578 bulbs but from the looks of that bulb on v-leds it doesn't look like it'll fit. 01tahoenjn did you use nathan's list for your switched dome's?