Hello Bob133,
You can use dimmable bulbs if you don't have a dimmer (as they work on normal switches too) but you cant use non dimmable bulbs if you DO have a dimmer.
DIMMER SWITCH: SUITABLE BULBS:
-----------------------------------------------------------------
Yes Dimmable bulbs only
No Dimmable and non dimmable bulbs OK.
Thanks for using Q&A. [DG]
Answered by: DGIFF
Date published: 2019-11-13