Constant current dimming is used widely for mid-power LEDs in architectural applications. Usually there is a significant number of LEDs, in the 10s or 100s, suc

Constant current dimming is used widely for mid-power LEDs in architectural applications. Usually there is a significant number of LEDs, in the 10s or 100s, such that individual variations would average out over the series. You have some color shift, usually toward greenish hues, but this is generally not a consideration. It might be more of a problem in automotive applications, where for a headlight you use only a few high-power LEDs.