My instructor for environmental design actually has a patent for something similar to this, but his is more for an RV. It seems like it would produce sufficient task lighting(2,400 foot candles at 30") but not enough to grow buds with. Also, the thing looks likes its just mirrors and refractors/deflectors which seems like they would just absorb more light than worth it when looking at the aspect of growing with the device. In terms of adding some day-lighting to a room with no pre-existing skylight, cool idea. If looking to grow by this, install a skylight.

-C