Here's a pic of the mounted scoop light on TFTC.
Goes in a 555 socket (Miniature Wedge Base 2-Lead Socket With Rear Mounting Bracket)
http://www.pinballlife.com/index.php?p=product&id=294
The lower plastic goes on first, then the lamp socket held down by the short hex post, then the mostly-clear plastic on top.
RM
TFTC_Scoop_Light.jpg