If they are regular bulbs, I’d go with smart switches instead.
The bulbs are burnt out.
Do you want normal bulbs? Or do you want RGB bulbs? If you’re sticking to normal bulbs, they’re cheap and you are likely going to be better off with smart switches. But it does require some hardware spend.
I want them to dim as the sun comes up and brighten when the sun goes down. I’ll probably also look into smart switches at some point too.