Not all incandescents when dimmed act the same. Dimming can shorten some incandescents life. Dimming LEDs always extends their life.
LEDs can only extend their useful life with heat mitigation
An led run at 100% current will melt itself off its solder pad if the heat is not dissipated.
What engineers due instead often or in combination, is to design in a scale back method where the pwm signal driving the led string is reduced, cutting the current to the led, which dims the light output.
Finally, if you want nice warm white led light, buy 2700K bulbs with a CRI of 90 if you can find them.
> Dimming can shorten some incandescents life.
How’s that?