I also have installed LEDs in ceiling "cans". I believe one added benefit of LEDs is you can run insulation right up to the cans because they don't produce heat; whereas incandescent bulbs can burn out prematurely unless you use the cans that allow insulation (which I did not because I did not think of it). So if you are planning to sound proof your ceiling to keep the beautiful noise of trains from driving your family nuts, you may want to consider this.
[Ceiling insulation might make another good topic because mine isn't finished yet and I'm leaning toward Roxul insulation for sound. I prefer the insulation against the bottom of the upstairs flooring so that I have access to pipes and wires in my ceiling -- so I am going to probably put in 1 x 1 inch wood strips about the ceiling to contain the insulation above the wires and plumbing. (see photo) But I digress...]
I am running dimmable LEDS (make sure they say that on the pack) and blue incandescent 75 watt flood bulbs side by side with dimmer switches. That way I can get variable white light and then variable blue light when I want the layout to be a nighttime scene.
I noticed on your Ebay link you show blue and colored LEDS. I bought dimmable white LEDs in 2 packs at Sams Club which work great and are priced right. After experimenting, I've decided to run 75 watt flood incandescent blue bulbs for a nightime effect. I tried blue LEDS and the lighting was awful -- made buildings and such look like they were under a black light -- too intense (photo).