Greetings,
I used the NewHouse Lighting MR11-2530, which is "MR11 2.5W 250 Lumen, 3000K LED Bulb".
I had to dig them out from the left-over parts from this project.
No improvements because I am finished with digitizing all of my slides. Now just have to get rid of what is left of the project, like the slide projector, the stand, etc.
Hope this helps...
Gary