We used Kichler Linnear Lighting (strips with "plug-in" lampholders) based on some early research here and our electrician's rec's (about the only good rec from him!).

We had problems with all the bulbs/lampholders lighting up when we turned on the lights--some consistently remained unlit, and some others took turns. We had to go around and tap or jiggle the offenders in order for them to light up. This went on for 2 1/2 years or so, and I finally got fed up enough to call Kichler directly a few months ago (I think I'd called them early on, replaced a few of the holders, but the problem wasn't solved, so we lived with it).

I spoke with a woman on the phone who asked one of the techs about this. He suggested that we might had had the older style holders, which were known to have the very problem we were experiencing, which is why they'd modified the design of the lampholders. They sent out some new holders to try, and voila--problem solved. All the old holders were replaced (THANK YOU Kichler!!!), and now, when we turn on our U/C lights--they all light-up!

You can use fewer or more lampholders, spaced along the track, depending on your lighting preferences or needs. They give nice even lighting. Ours are installed at the front of the cabs, just behind the light rails. We used black wiring, tracks, clips, and connectors, as our granite is a shiny black. The only thing you really notice reflected in the granite are the lights themselves.

HTH!