A note about cd: candellas are a unit of intensity, and not light output. So a 10cd LED with a 30 degree viewing angle would output the same amount of light (lumens) as a 5cd one with a 42 degree viewing angle (I think I got the math right).
Now, which should be of greater concern is up to you; I would think that a targeted light such as a reading light you're concerned about the candellas (as long as the angle is sufficient), while a flood light like the floorwell you'd be more concerned about lumens (and may what to use a diffuser to spread out the light)
edit: ah, pictures! Looks like you already have a diffuser on the floor lights.
I'm not sure how much the domed enclosure is involved in focusing the light. But the reason the ebay LEDs have so little viewing angle is that they are cheap - or rather, narrowing the beam is a cheap way of pumping up the mcd rating, which is the only thing alot of people seem to pay attention to.
edit: come to think of it, I don't think the dome focuses the light at all. Lightly sanding it is a common method of diffusing the light though.