Very nice! Was madagascarensis originally considered a synonym to baroni?
You can see why they are called thumbnails! About as big as most other frogs froglets.
On the sunlight, I'd definetly agree with that...it produces noticeable changes in fish colorwise, but its pretty incredible they require that to survive. If I was to receive a ~very~ hard crack on the head and turn into a reptile keeper I'd be keeping species that do not have a strict U.V requirement like some geckos. I hope we eventually find some live foods that allow us to not use supplements on the darts as that would make things much easier.