Abstract: A photo-bioreactor module adapted for stacking a plurality of such modules for producing algal bioproducts includes at least an upper and a lower light-transmitting member each having a plurality of openings. The upper and lower light-transmitting members are spaced apart from one another and at least one of the upper and lower light-transmitting members includes at least one light connection terminal for coupling in light from a light source and transmitting the light laterally. A plurality of photobioreactor conduits each extending from respective openings in the upper and lower light-transmitting member define algae containment interior spaces, wherein the plurality of photobioreactor conduits contact the upper and a lower light-transmitting members along areas of contact. The light transmitted laterally by the upper and lower light-transmitting members couples into the plurality of photobioreactor conduits along the areas of contact.