In , Art Todesco wrote:
Andrew Rossmann wrote:

The brightness is mainly due to a greater on-percentage. It probably
depends on your sensitivity and ambient light. One easy test to see if
the rectifier is working properly is to wave a bulb sideways in front of
you. You should be able to see it turning on and off.

Yes, with the full wave rectifier you will see very short off period (when
waving thelamp). With half wave, you see the 50% on and 50% off.

In my experience, halfwave in an LED string has duty cycle a lot less
than 50%, since much of the time the instantaneous line voltage is too low
to make any current flow through the LED string at all.
With fullwave, expect the duty cycle to be not that high despite being
doubled (or a bit less than doubled due to voltage drop of the bridge
rectifier).

- Don Klipstein )