DIYbanter - View Single Post - Why aren't many / most LED light bulbs dimmable?

G. Morgan[_6_]

(Don Klipstein) wrote:

Brightness of LEDs is controlled by how much current flows through them
- same as with dimmable CFLs. All that is necessary is to make the
current control circuitry in the LED "bulbs" compatible with and making
use from the usual dimmers, similar story as with CFLs.

I was taught (in college) that once break-through voltage is
equaled, that's it, on or off. Now I have to learn WTF went wrong
in my imaginary circuit if that is true.