Well I have been looking for lights and have looked on Amazon, Ebay as sell as specialty lighting companies and model railroad companies. Almost everything is 3' long with the lights space 2" apart or so. Although most can be cut shorter that is still a lot of wire to get in a small area.
I'm also looking at EL Wire, also known as Electroluminescent wire and even thinking about plastic fiber optics. One of my favorite light I had and still have is a glass fiber optic fan burst with a color wheel below. I watched that thing for quite a while when I was in college! (No, not under any influence.
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I did see some strands of lights that were 20" long and were battery powered without a timer. There are $1.65 per strand, but I didn't check the shipping.
If anyone else knows of anything, let us know please!
Karl