I've had my Monstera deliciosa for three years now and it's finally started producing the fenestrations I was waiting for

I've had my Monstera deliciosa for three years now and it's finally started producing the fenestrations I was waiting for. I think the turning point was moving it closer to the east-facing window—the indirect morning light seemed to make all the difference. That said, I'm curious whether others have found that light intensity matters more than duration, or if it's really the combination of both. Has anyone else noticed their Monstera take a while before the leaves really started splitting?