We have these lights all through our 36RD5S. I love them. Was told do not touch the bulb, the oil on your skin will make them burn out faster (this was after I burnt out several at the $7.00+ a hit,
). I use a pair of needle nose pliers, on one of the ends, get them started, then push them the rest of the way in with my fingers (use a piece of the packing around the bulb, to keep my fingers off it).
I get my bulbs at the web site below, they have 2000 hour for .90 each, or 10,000 hour bulbs for 1.97 each. Kind of a no brainer on that one
. I bought the 10,000 hour one in 10 watt and 20 watt, and they do last. We are full time, so our lights are on all the time, not just a few months a year.
12 Volt - G4 Base | 1000Bulbs.com
Hope this helps