Lighting can be very important in your curio/display case. Both my curios have halogen lighting. They are nice and bright and I'm sure the HLs will always be warm.
Positioning of your HLs in the curio can be important as to whether or not the pieces on the lower shelves get any illumination. Too many pieces on the top shelves shade the lower shelves.
Until I purchased the second cabinet, I had the bad habit of trying to display too many HLs on one shelf. Now that I have two cabinets in place, the problem has been addressed. No, not because I have twice as much room, but because I decided (with a little help from my wife) to put some away in their boxes in the cellar.
She was correct when she told me I was crowding them which had a tendency to detract from their beauty. Rather than overcrowd the cases, I rotate the display every couple of weeks. Less HLs in the case but they look better on display when the light can filter through the upper shelves illuminating the lower shelves. I should also add that one of my curios has a curved glass door that reflects light to the lower shelves without it having to filter through all the shelving. Whoever though that up had a great idea.
I think I've seen the light!
Bob