Can an incandescent light dimmer be used to dim LED lights?
I got my son a good brand of LED A lamps that says dimmable.  When we use a regular dimmer they dim, but not like a regular lamp.  When you dim them with a regular dimmer you might not get the same dim from time to time, and on ours the dimming is through but you have have the slide to go. We put these LED's in his fan lights at home and he keeps the full bright.

I know dealers of some of the retrofit LED trims and most of them say use the regular dimmer, but the main reason for that is so you don't have to buy new dimmers when replacing the lamps with LEd's.

Lutron makes a dimmer in the C.L family line that dims LED's and CFL's.  These dimmers have a little trim screw dial that you can adjust to lengthen the dimming portion of the dimmer and you set it to be a full range dim on the dimmer.



Older electricians will probably remember the trim setting from older ceiling fans and adjusting them to the full range to tell you if it is on or off.  the fan motor would still turn the blades until it is clicked off.

The picture tells you what they look like and what you can dim with them. The 3 way version of this is the same price as a plain incandescent dimmer, so that is what we use for both 3 way incandescent and 1p or 3way LED or CFL dimming.