One of the architecture firms I used to work for did a big project for 3M a few years back. One of the things they incorporated into the building was a new product they were developing. It was a tracking mirror solar lighting system that used the mirrors to capture sunlight and reflect it into the office space. I don't know if your roof/ceiling structure would allow it, but it's an option if someone is still making them. Note, these are NOT the 'solar tubes' which are just a skylight with a piece of duct. Those might work too as supplemental light.

TW