The reception area, the dining room, and the bedroom are all what I'd call pretty light (natural light), while the rest is lit to make up for it being the lower ground floor. It's not completely underground, only lowered a little.
You're welcome to stop by and have a look for yourself.
[Private to Dean] I'm not renting the flat out for profit, simply because it's a waste to leave it unused, so I'm only asking for what would cover utilities.