Someone needs to look up above the lens to see what is up there. The lamp and the color of the enclosure can be causing the yellow. The enclosure should be painted white and the lamp should be a higher kelvin number such as 4100 or 5000. You'll see this on the lamp - example F32T8 741 That means it's a 4100K lamp. Lamps in the 2700 or 3000 range are going to be yellowish.

The enclosure is painted black (at least most of it is). This was done so that it looks correct from the outside. I don't know if they could paint any of it white or not. Would this effect the yellow color? I think they can live with the black look when the light is off.

I will pass on the word to look at the fixture and bulb with your suggestions. Maybe the contractor has a ladder out there tall enough that I can send my husband up to do some investigative work!

I'm not understanding why it was painted black. A real dormer would not need to be painted black inside to look right outside. Dormers are supposed to let light in and by default, out. Only a fake dormer that was put on to look impressive from the outside would never be lit. So you are trying to make it look like a fake dormer from the outside? Black is not going to work. Black is black because it absorbs all wavelengths of light. It's terrible at reflecting and guiding light.

The yellow must be caused by the lamp.

There are three dormers on the house. This is the only one open below. You could see the framing inside until it was painted black.

To clarify, you could sometimes see the framing inside the dormer when looking at them from the outside. All three are in a row so they all needed to look the same from the outside.

Try a virtual skylight:

http://www.skyfactory.nl/?landing

Now THAT is cool!

Bet it is pricey too!

I think a visit to the gyno or the dentist, etc would be much more pleasant with something like that to watch vs counting the ceiling tiles!