Ok, received my trunk light today. 39mm a little small, go with a 42mm. i made the 39mm work though by pushing in the contacts a hair. this was the 16LED
Wanted it to be perfect so I ordered a 42mm 12led but this one is a 5050 so it should fit and be much brighter even with 12 vs 16 leds.
http://www.ebay.com/itm/220951036181...84.m1497.l2649
As cheap as these are you can mix and match till you get it right. No shipping on most chinese bulbs