Skylights are a great way to bring natural light into an otherwise dark space. The latest technology in skylights has them fully automated with touch screen remote controls and water sensors that can automatically close the unit if rain is detected.
The unit in the photo (left) brings much needed natural light into this bathroom with no windows and also affords additional ventilation in an area where it is needed most.
In the case where there is a space restriction or limited budget sun tunnels are another viable option. They work by channeling the sunlight down a much smaller cylindrical tube into the finished space. In our COTY Award winning Bath remodel we used 3 sun tunnels that were finished to mimic the look of full skylights but allowed us to work around obstructions in the attic space giving the illusion of a full size skylight from the finished space.