Jay, I buy 5 meter rolls of LED lights. I cut lengths and solder them to plug connectors and mount them (3M - adhesive-backed) to pieces of aluminum. I use a small UR/CE rated transformer which mounts easily under the upper cabinet skirt, out of sight. The LEDs come in 24 or 48 watt, 12 volt, and are dimmable. There is a dimmer I buy that looks like an iPod nano. Touch it quickly to turn them on or off, hold your finger on it and it will cycle from dim to bright , touch and hold again to cycle back to dim, releasing when the desired brightness is achieved. I'll have to visit the two kitchens I recently installed them in and take my Contour Roam to grab a video.
I use sections of 5/16" diameter brass tubing, and mount them behind the front edge of the upper cabinets and wire them to the dimmer, so no matter where you are standing you can easily reach up and turn them on or off and dim them.