Automatic or scheduled adj to Controller brightness

I've started using the Controller's clock screensaver as bedside clock as I can no longer see the clock on the SB Radio clearly (getting old is rubbish, don't do it). Brightness needs to be turned down way low so as not to illuminate the whole bedroom. Works fine like this.

However, when I want to use Controller to change channel etc it's a hassle to have to turn brightness up and then back down. Is there any automated way that'll help? I guess ideal would be that screensaver has a different set brightness to Now Playing.

I've tried searching and found an unresolved query on the same topic from a couple of years ago so thought it'd be worth a try now
Thanks in anticipation
Jeremy