Hi
I have long strips of fluorescent lighting under my cupboards. It doesn't seem to get as hot as spot lights/halogen bulbs, but they do certainly generate heat. The light is also a horrible cold shade.
One other problem, is that they highlight the whole area, so it needs to be kept spotless!(I have black shiny granite on the countertops, looks awful if not spick and span!).
I got an electrician in to install these, after my place was finished, but I usually don't turn on these lights, because of the colour, and the high-lighting effect. This is probably made more apparent by my granite worktop however.
Regards
Nicola