Trigger on Trådfri available

Configuration
1

I have Ikea lights.
I have one that I usually turn on and off from the wall switch.
Trådfri lights remember the brightness they had when power was cut.

I would like the brightness to directly go down to 50% if it is late at night and I turn on the light. and 100% if it is during the day.
This is not a problem if I use a smart power switch, but I haven’t figured out a way to do this by cutting the power to the light.
Is there a trigger that triggers on availability?
Is there a way to accomplish this?

2

the state trigger can do that, but you will probably get flashbang before the automation kick in, because it is the light that remembers its state.

here is an example:

platform: state
entity_id: light.cuisine_1
from: unavailable
to: 'on'

the (to: ‘on’) is not obligatory though