Leave a small night light on in the room where the cage is.
Could you send a photo of the setup you have like with the lights?Don't turn lights off suddenly, it is scary for the birds and gives them no time to prepare. My two love their bedtime routine, I turn off the main bright light but leave the side lights on, it makes a sunset kind of lighting. If they're outside the cage and playing, they'll start heading back to eat, drink and stay near their "safe spot". I'll then turn off more lights bit by bit over the course of an hour. It's amazing seeing how they behave, it's like clockwork. They'll be on their sleeping perches and happily preening by the time it's too dark to properly see, but I always give them a nightlight, as it helps them get back to their perch if they fall in the night or get scared.
Also, routine is so important. My two will put themselves to bed at 7pm as that's when I start dimming lights. On the weekends, I let them stay up til 8:30pm but they usually aren't interested and just want to sleep. So if your sleep routine is inconsistent, don't subject your birds to it as well. Give them a routine as they'll be happier and less stressed during bedtime.
thanks for everythingI bought some home automation dimmable lights (Philips Hue, but I'm sure there are cheaper alternatives), they're controlled from my phone. At 7pm, I have them all go from 100% brightness to 0% brightness over the course of an hour. I leave one bulb as a nightlight and tell it to dim from 100% to 30% over the course of an hour.
Then my living room has one really bright LED strip that goes all the way around the ceiling, this brightens the room the most. This is the one I turn off first at 7pm. I then have two sets of ceiling lights on each half of the room. I switch one half off, then the other, over the course of the hour. If I'm out and won't be home to do this, I'll just leave the non-automated lights off, they get plenty of sunlight through the windows + the automated lightbulbs means they're fine. I also have automated blinds that open / close when I want them to. So the blinds open 30 minutes after they wake up in the morning, and close at 6pm an hour before bedtime dimming.
My setup is excessive and totally not required! I was doing this all manually before as I don't typically go out and it was fine. The automated dimmable lights just makes life easier as I don't have to do anything. I used to use a normal old lamp for their nightlight, I'd put it next to their cage and leave it on all night for them and make sure it wasn't too bright.