Same nervous lights problem with in-wall dimmers here.
My network contains solely Duwi Z-wave controllers so no interference from other home automation devices on the power line.
There doesn't seem to be a specific period of the day, although I usually don't have my lights turned on during daytime hours. Most events occur between 1800 and 1900.
Dimmers connected to:
- 4x 20W halogen spots
- 4x 10W halogen spots
- 4x 40W regular light bulbs
- 2x 40W regular light bulbs
It looks to me that the halogen spots are mainly affected by this behavior, although it sometimes also affects the regular bulbs.
It probably has nothing to do with it, but I also have a clearly audible high frequency tone coming from some of the dimmers, especially when set to off mode (annoying).
Removed the dimmer in my bedroom because of this.