I just got these to try out:
http://www.ebay.com.au/itm/181965723679?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Went for battery as I didnt want to bother wiring them in if they weren't any good. ive put them along the shelf above cupboards either side where they sit just behind the rail. They look good and backlight the space above the cupboards really well. Red is great for night sailing and gives a nice soft light enough to illuminate the cabin area but not effect night vision. Warm whiteish looks superb.
Even being 3xAA powered, they are quite bright and you'd want to think about shielding them behind something so you don't end up looking straight at them.
Only thing I don't like is skipping through all the different colour choices. All the other colours look crap.
Will probably now look at hard wiring in two different strips, red and warm white.