Ok, this thread is sort of old. Has this feature been implemented on the C420 or the H200?

........also -- does it make any difference in the operation of these bulbs if the circuit is controlled by a conventional dimmer switch?

I own a Kasa smart dimmer and 4 Kasa smart outlets. Very happy with the way they work. I also own a Philips Hue system that I am currently not impressed with. I would like to install another Kasa...