Picture Light

This is a custom thing you may not be able to use, but may be, it will be an idea generator for you.
We bought frames from IKEA, but when we hung them above the staircase they weren't properly illuminated even during the sunshine with all lights on on 1st and on 2nd floors. I couldn't find any lights for pictures on Amazon that would fit the design of the frames. So the obvious solution - 3D print my own.
Light and neck snap together. For each light I used one segment (3 leds) from the led string I got from Amazon (~$16 for 300 leds on one string). The neck of the light has a groove to conceal the wire.