We are pleased with the lights. We used Brightest 160 Lumen G4 Base 10 SMD LED Bulb 12V AC DC for over head lights and 6 Surface Mount White LEDs G4 Light Module 12V AC/DC for reading ligths.. We got these from

http://www.ledwholesalers.com/store/index.php.

The hard part is to decide if you want the white white light or the warm light. Got some of both and like the warm but other people like the white. We found that the 6 led was more then we need for our reading light.

http://www.superbrightleds.com/cgi-bin/store/index.cgi?action=DispPage&Page2Disp=%2Fhobby.htm

Used this place for G4/MR16/MR11 to BA15 Adapter

Convert BA15S single intensity single contact base with parallel locking pins, BA15D single intensity dual contact base with parallel locking pins, or BAY15D dual intensity dual
contact base with offset locking pins to fit G4/MR16/MR11 base lamps