I have recently added two of the wedge type leds for my trackball and I am also using them to light the coin doors. They seem to work great. The 1157 type leds put out a lot of light. I am planning on using it instead of the wedge type for the trackball. The wedge type lights the trackball, but I have them mounted like the typical trackball lights and the main part of the light from the leds is not in the correct direction (still works good though). When I was testing the 1157 types, they were held under the trackball and lit up the ball really well (it also put a lighted spot on the ceiling), but a mounting bracket has to be put together to attach it to the trackball.
I ordered some extras (wedge type and 1157/1156 type) that will soon be sent to Kevin Steele for a proper review.
IMO, they seem like a good alternative for functionality and price.
ss