TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The fluid further contains air, nitrogen, and/or carbon dioxide. The phosphor comprises an oxide, a nitride, an oxynitride, a phosphide, a sulfide, a selenide, a halide, or a silicate of zinc, cadmium, manganese, aluminum, silicon or rare earth metal.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The first flow path segment and the second flow path segment are arranged in parallel and aligned in a same direction. The light-emitting panels are spaced apart at intervals along a first direction within the interior space of the container. The intervals define the cell passages extending between light-emitting surfaces of adjacent light-emitting panels. The fluid circulation system injects a fluid into the fluid medium within the container and cell passages to generate a buoyancy-driven channel flow through the cell passage. The fluid contains nutrients for supporting the growth of the photosynthetic organisms. One of cell passages comprises a uniform cell passage having a cross-sectional area that is constant along a portion of the serpentine flow path, and a convergent cell passage having a cross-sectional area that decreases along a direction of the continuous flow. One of cell passages comprises a uniform cell passage having a cross-sectional area that is constant along a portion of the serpentine flow path, and a convergent cell passage having a cross-sectional area that decreases along a direction of the continuous flow. The light source comprises a first array of light-emitting panels and a second array of light-emitting panels. The first array of light-emitting panels is spaced apart at first intervals along a first direction within a first interior space of the container. The first intervals define the cell passage extending between light-emitting surfaces of adjacent light-emitting panels in the first array. The second array of light-emitting panels is spaced apart at second intervals along a second direction within a second interior space of the container. The second intervals define the cell passage extending between light-emitting surfaces of adjacent light-emitting panels in the second array. The continuous flow includes a first serpentine flow path extending through the first array of light-emitting panels in the first direction and a second serpentine flow path. The second serpentine flow path is fluidically coupled to a distal end of the first serpentine flow path, and extends through the second array of light-emitting panels in the second direction opposite to the first direction. The first and second serpentine flow paths form a lap in the container. The photosynthetic organism harvester is coupled to the container, and is configured to extract some of the photosynthetic organisms grown at each lap in the container or several placed per lap. The light source is further configured to illuminate some of photosynthetic organisms with light comprising peak light emission corresponding to an absorption spectrum for chlorophyll A and/or chlorophyll B. The peak light emission has an emission wavelength of 440-660 nm. The light source further comprises LEDs and/or light-emitting micro-cavity plasma discharges and a phosphor emission. The nutrient supply system is coupled to the container, and is configured to introduce nutrients for supporting the growth of the photosynthetic organisms. The nutrients are suitably treated, filtered, aerated and/or supplemented with additional nutrients. The nutrient recovery system is coupled to the container, and is configured to recover some of the nutrients and to re-introduce the recovered nutrients to the container. The monitoring system (270) is coupled to the container, and is configured to sense processing parameters. The processing parameters include a concentration of the nutrients, a concentration of photosynthetic organism, a fluid level for the fluid medium, a pH for the fluid medium, a flow rate for the continuous flow, and/or a lighting property of the light source. The control system is coupled to the photo-bioreactor, and is configured to control the processing parameters for optimizing production of the photosynthetic organism. The cleaning system is coupled to the photo-bioreactor, and is configured to facilitate cleaning of surfaces on the light-emitting panel and/or the container. The vent system is coupled to the photo-bioreactor, and is configured to exhaust excess gas from the container. The heat exchanger is coupled to the container, and is configured to adjust and/or control a temperature of the fluid medium. The maintenance bridge is configured to span the container and to allow inspection, reactor component installation, reactor component extraction for remote maintenance and/or cleaning of the container.