[cassianoleal]

> want to light up only AFTER being connected to the WiFi

Do you isolate them at the switch? If you do, then it's less likely "connected to WiFi" and more likely that's the time to boot up the firmware.

If you don't, then they should always be up and connected to the wifi.

I've used Shelly lights with no issues, even pressing the button on a Zigbee switch to send a signal to Home Assistant who would in turn tell the Shelly to switch on was always instant.

[Diti]

I actually described it incorrectly. I was indeed talking about the response time after using a light switch to turn on the lights the dumb, old-fashioned way.

So, yeah, you’re right, it must be the time it takes for the firmware to boot up. My question still stands, then – can this boot-up time be reduced or avoided?

[cassianoleal]

Probably not. The way these lights are supposed to be operated is indeed always on. If you want to keep the old-school switch, you can put a smart relay behind it.