Create pulsating 'sleep mode' outdoor lighting (like the Macbook light)?

[MEarly]

It’s definitely possible. I’ve seen the pulsing “breathing” effect in this device handler:

[UPDATED] Osram Lightify RGBW A19/BR30 US version (HA) DTH

Intended for the US HA version. May work with the European ZLL version, but not tested. Implements: Custom On/Off dim duration (in preferences) Custom dim duration for level change (in preferences) Custom duration for color transition (in preferences) Pulse (aka ZLL breathe) and blink (custom commands) Color loop/cycle UI enhancements Updated 6/6/17: set default color/level code by @ranga To set default initial (power-on) color/level: set your preferred color/level wait for a few seconds, then tap the Set Default tile wait 3-5 minutes for the process to complete (do NOT switch off or change any settings during this time) the main (on/off) tile will turn orange with “WAIT” status during this period; if it does not reset after 3-5 minutes, tap the refresh tile after that, you can try…

It’s the Pulse aka ZLL breathe effect.