I'm replacing my old recessed lighting by retrofitting them with LEDs. I'm using a Lutron Diva DVCL-153P dimmer switch to control these recessed lights, but when set at low dim levels, flipping the switch results in a 3-5 second delay before power on. I've tried several different LED models now with varying results:
- Sunco DL_BFDR56-13W-27K (very short delay but significant flicker)
- Halo LT560WH6930R (very long delay)
- Feit Electric LEDR56B (short delay)
I assume that this delay is caused by the LED driver waiting for the dimmer capacitors. Is there any possibility that the dimmer switch is the culprit? It's supposedly compatible with the Halo and Feit lights according to the Lutron website.
Edit
This is the best resource I've read to understand all these nuances.
https://www.manufacturer.lighting/info/190/
Best Answer
IMPE, it's virtually guaranteed that the dimmer is the cause.
I opted to get LED dimmers, because the LED units I got were dimmable.
"Why not?"
The nasty bits not mentioned: include does not go to full brightness, at least 1/2 second perceptible delay (at full brightness) with my dimmer/lights combination (.vs. normal instant with a normal switch) and for one set of lights a highly annoying noise (not present with a normal switch.) If you care about such things, also destroys the power factor (switched LEDS 99 or better, dimmer on full power, I forget but lousy, like 57.)
I left one in one position, I removed the others and replaced with normal switches. The last one still irritates me with the delay to turn on and may yet get replaced. It's the dimmer taking time to power up and get on the job, from what I've seen - not the LED drivers.