Sundolier Robot Pumps Sunlight Indoors

Just came across this. Pretty sweet concept, tracks the sun outside, then reflects it through tubes to rooms through out your house. While very cool for free and green lighting in your house, I couldn't help but to think of its possibilities for indoor growing.

http://www.inhabitat.com/2010/04/02/sundolier-robot-pumps-sunlight-indoors-for-powerful-daylighting/

def. I wonder how much lumen str there is or how much with a solatube where the opaue inside emitter is taken off.