NOVELTY - Photobioreactor for cultivation and/or propagation of a photosynthetic organism comprises: (a) a vessel having a wall defining an interior vessel volume; and (b) a lamp assembly positioned within the interior vessel volume, where the lamp assembly comprises circuit boards, each comprising at least three edges, arranged in a substantially spherical shape defining an interior lamp assembly volume.    USE - The photobioreactor is useful for cultivation and/or propagation of photosynthetic organism; for producing docosahexaenoic acid (DHA); and for storage of light energy (all claimed). It can also be used for producing one or more compounds (e.g. biomolecules) including but not limited to fatty acids such docosapentaenoic acid (DPA), eicosapentaenoic acid (EPA) or other fatty acids or other compounds such as phycobiliproteins (e.g. C-phycocyanin, allophycocyanin, and phycoerythrin), and biofuels such as phytol and other various petrol fuel substitutes from the photosynthetic organism.    ADVANTAGE - The use of photobioreactor permits unexpectedly high growth and density of the photosynthetic organism thus maximizing bioconversion efficiencies and product yields from the photosynthetic organism.    DETAILED DESCRIPTION - Photobioreactor for cultivation and/or propagation of a photosynthetic organism comprises: (a) a vessel having a wall defining an interior vessel volume; and (b) a lamp assembly positioned within the interior vessel volume, where the lamp assembly comprises circuit boards, each comprising at least three edges, arranged in a substantially spherical shape defining an interior lamp assembly volume, where the circuit boards comprise a first planar surface in contact with the interior lamp assembly volume and an opposing second planar surface comprising light emitting diodes (LEDs); and a barrier that surrounds the circuit boards forming the substantially spherical shape. INDEPENDENT CLAIMS are:    (1) a lamp assembly for use in cultivation and/or propagation of a photosynthetic organism, comprising circuit boards, each comprising at least three edges, arranged in a substantially spherical shape defining an interior lamp assembly volume, where the circuit boards comprise a first planar surface in contact with the interior lamp assembly volume and an opposing second planar surface comprising LEDs; and a barrier that surrounds the circuit boards forming the substantially spherical shape;    (2) a method of producing docosahexaenoic acid (DHA), comprising: (a) providing one or more photosynthetic organisms comprising enzymes for generating DHA; (b) adding the photosynthetic organisms to a vessel of a bioreactor comprising a liquid growth media; (c) contacting one or more photosynthetic organisms with light emitted from a lamp assembly, where the lamp assembly comprises: circuit boards, each comprising at least three edges, arranged in a substantially spherical shape defining an interior lamp assembly volume, where the circuit boards comprise a first planar surface in contact with the interior lamp assembly volume and an opposing second planar surface comprising LEDs; and a barrier that surrounds the circuit boards forming the substantially spherical shape; and (d) producing DHA from one or more photosynthetic organisms; and    (3) a method for storage of a light energy, comprising: (a) providing one or more photosynthetic organisms comprising enzymes for generating one or more compounds from a light energy; (b) adding one or more photosynthetic organisms to a tank of a bioreactor comprising a liquid growth media; (c) contacting one or more photosynthetic organisms with light emitted from a lamp assembly, where the lamp assembly comprises circuit boards, each comprising at least three edges, arranged in a substantially spherical shape defining an interior lamp assembly volume, where the circuit boards comprise a first planar surface in contact with the interior lamp assembly volume and an opposing second planar surface comprising LEDs; and a barrier that surrounds the circuit boards forming the substantially spherical shape; and (d) producing one or more compounds from the light energy.