These are dimmable. They worked much better with the analog dimmer switch installed previously. I swapped them out with other dimmable LEDs and got the same result.

Hardware version 1.0, Firmware 1.5.8.

I switched the bulbs to incandescents, which fixed the problem. The switch now dims fully. Incandescent bulbs are being phased out or made illegal, so it’s not a permanent solution.

I've noticed others with this problem. The lights dimmed fully when not connected to wifi, but when connected they only dim to about 50% max. I did the calibration and have the latest firmware. The...