I used LED Strip Lighting from elementalled.com, replacing older hockey-puck halogen lighting. These strips have LEDs every 0.65" along 0.3"-wide flexible strips, consume only 1.44W per foot, and look spectacular. They're low voltage (12V) and dimmable, available in several colors other than the "warm white" (3000k) that I used. I routed a 5/16" wide by 1/8" deep groove in the bottom of the cabinets, and glued the (self-adhesive) strips in. Corners are a little tricky, because the strips, while flexible lengthwise, don't bend around corners in the plane of the strip. But you can splice strips together in any configuration by soldering jumpers across the joined strips, and power up to 32.5 feet with one power supply. Very versatile, very attractive, and unfortunately pretty pricey, but I'm using them in lots of applications -- under-cabinet, above-shelf, cove, etc. They'd also work pretty good underneath a street-rod, but that's beyond the scope of this forum, I guess.