Just thought I'd post a picture of my lighted art work. We ended up using just one 4 inch recessed low voltage light with the aiming elbow trim. To me it does not look like it needs the 4 or more lights that the previous poster suggested. There certainly is a big difference in how the art looks with and without being lit. First picture is with recessed light off. The flash made a white spot on picture. Second picture is with light turned on. No flash needed on camera what do you think?

Recessed fixtures for slope ceilings are adjustable to allow the lamp to be aimed straight down. Standard recessed housings can use adjustable trims. Recessed fixtures made for slope ceilings have this adjustability inside the housings for a cleaner looking ceiling with less glare. With typical 6" housings the cylinder walls will be perpendicular to the ceiling if standard or approximately perpendicular to the floor if slope. You need to find out the brand and model of the housings to choose trims so you're going to need to get up there and read the label. Buy the trims from the company that made the housings to be ensure code compliance because they are ETL or UL listed that way.

I DO NOT like my recessed lighting on the sloped ceilings. I hate the dark shadow gap in the model of the Iolite that I have - it is very noticeable on my white ceilings. I don't know why they designed these lights this way. My advice- buy a fixture which has no gap when it is tilted- even if it is a gimball. I believe the newer models of Nora no longer have these gaps. Also- one feature I love with my receseed lighting is the dimmable option which allows you to go from a very low K to 2700K. When I turn down the lights- they are much warmer and create lots of ambiance. And I just keep them at highest setting when I want brighter light. I should have done this with every recessed light in my house except the bathrooms and the kitchen - with are fine with just normal 2700 dimmable. And- don't add too much recessed lighting. It's better to have fewer fixtures, fewer switches (NO MORE THAN 3 per plate if possible), and more traditional lighting using both table/floor lamps, sconces, and ceiling fixtures. But I prefer more traditional homes so.....

We recently put all new LED ceiling lights in as part of a larger whole house remodel. Although not in a bathroom, for the slanted ceilings in kitchen and family room, the GC wanted to put lights that pivot (I think they are called Gimbals). We rejected that and had them install normal LEDs that do not move. The ceiling lights create general lighting, and we didn't feel we wanted more directional lighting coming from the ceiling. In a bathroom your task lighting will be sconces in or on either sides of the morror, or lighting over the sinks. This is a personal choice and the GC was surprised we didn't want the gimbals, but we really did not. Other things to consider are the temperature of the lights. The higher the number, the more cool/daylight the light will be. I prefer the more daylight ones. Also, it's nice to put them on a dimmer so you can control the brightness. I can't recommend a particular brand because the electricians buy them in huge quantities and we went with what they supplied.