Dimmable Bulbs
www.energyfederation.org/consumer/default.php/cPath/2050_25_44
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Dimmable compact fluorescents tend to dim well with mechanical slide and rotary controls, but less well with electronic dimming controls, programmable controls, and remote controls. These special bulbs should not be screwed into "hot" sockets, so be sure