I have seen the 120v ones and there are still 12v units also. All are a pain in the behind. I will only use them if the homeowner is not willing to go with my recomendations. <confesion> I've run #12 lamp cord and I use crimp on butt splices accesible under the cabinet. When I supply fixtures I use Kichler Cabinet Lighting System. Having installed thousands of UNDERCABINET lights (drives me crazy when people say "undercounter") I find these are by far the easiest to install and the price is reasonable as well.
www.kichler.com
