LED Driver ICs work with non-dimmable GU10 bulbs.

LYTSwitch™-0 ICs for non-isolated, non-dimmable bulbs in space-constrained applications feature efficiencies of more than 90%. Units also typically deliver constant current of more than

[source: http://news.thomasnet.com/fullstory/LED-Driver-ICs-work-with-non-dimmable-GU10-bulbs-20010275]