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For the 2nd and 3rd row and Cargo are I used 42mm festoons. Zero problems using these http://www.ebay.com/itm/Samsung-Chip-LED-Map-Dome-Interior-Light-Bulbs-6000K-White-42-MM-Festoon-/330936546122?pt=Motors_Car_Truck_Parts_Accessories&hash=item4d0d5af34a&vxp=mtr I used RED for the all areas except the Cargo area where I wanted a white light.
For the driver and passenger maplight I used a 194 LED and inserted it into the old PC579.http://www.ebay.com/itm/High-Power-Samsung-Chip-SMD-LED-6000K-Xenon-White-Back-up-Light-Bulbs-Porjector-/190905288913?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c72d788d1&vxp=mtr Snip the small wire leads from the old PC579 bulb and insert the new 194 bulb into it. Again I used Red since I drive a lot at night.
I stuck with 5630 and 5730 LED's for there lumen. I just did our entire Excursion except the Dash. Just installed the exterior tonight.