On Thu, 22 Oct 2015 14:34:33 -0500, wrote:

I've noticed that the stores sell both regular (non-dimmable) and
Dimmable LED bulbs. The dimmable ones are more expensive. What is
different inside of them?

I dont use dimmers, or I'd try this.

What happens if a regular bulb is connected to a dimmer?

I'd assume a dimmable bulb will work fine on a circuit without a dimmer,
or is there a reason to NOT use them if no dimmer exists? (other than
the extra cost).

A non dimmable lamp has a simpler "driver" circuit for the LEDs that
regulates the current to the leds without reference to voltage.

If you put them on a dimmer they will dim a little bit, then start to
flash and then if you keep dimming - shut off.

Dimmables work just fine without a dimmer - and I'd guess it won't be
long untill the price difference between the two is so small only the
crappiest LED products will be available as non-dimmable.