You were trying to dim milliwatt devices with a rheostat sized for watt
devices.  To do so would have required a rheostat with an order of
magnitude higher resistance.  Rheostat dimmers are inefficient, but they
work just fine with LEDs if properly sized.

Yrs,
d

On Mon, Jul 31, 2017 at 5:40 PM, Alistair Bell <albell@shaw.ca> wrote:

> Haven't found your basic led to dim very well david. Back in the day I
> made up led and resistor combo and fitted into the bulb holders for the
> dash lights.  It dimmed to a certain point ( via headlight switch dimmer)
> then off. Not the same dimming as the incandescent.
>