On Sun, 26 Dec 2010 11:15:58 -0600, AZ Nomad
wrote:

On Fri, 24 Dec 2010 06:25:05 -0600, G Morgan wrote:
Home Guy wrote:


I'm seeing more LED lightbulbs turning up on store shelves.

I don't think I've seen one yet that is ok to use with a dimmer switch.

I can understand why CFL's can't be put on a dimmer - but why not LED
bulbs?

This is new, last 3 years. They had to develop a ballast that was
adjustable. CFL's and LEDS are not a good comparison.

They're crazy-priced as is. Not being able to dim them makes them even
less desirable as a replacement for incandescent bulbs.


L.E.D.S. Are going to difficult (impossible) to dim. Remember
they are DIODES that only need .7V to illuminate. AFAIK ---
LED's are not dim-able.

Standards light dimmers use PWM, not variable voltage.

Actually, phase control, not PWM. Similar to, but not to be confused with.
With a nonlinear load, like an LED, it's quite different.

They should work
great with LEDs if not for the fact that LED's have a power
supply that converts AC power to low voltage DC and which will result
in the same low voltage DC based on the peak voltage in, the same for
1% as for 100%.

Completely clueless.