Thanks for your feedback. I thought that the 30x30 x 3 of would be better than the regular cage I had. And the division in the left is very deep and he has already made a tunnel and a nest where he sleeps.
You can see the "cage" better here:
https://youtu.be/W4p2tJsDhBk
And this is where he was before:
Blu - Album on Imgur
And this is where my OTHER dwarf is:
Hamster Green Eco Habitat - Album on Imgur
About the lighting, it is red so I can observe him without disturbing him. (I red that red is invisible to them)