Abstract:
The present invention relates to a light irradiation device, a device and a method for cultivating photosynthetic microorganisms. The light irradiation device according to an embodiment of the present invention comprises: a plurality of light sources connected in a linear shape; and a flexible connecting part which connects the plural light sources. The flexible connecting part includes a wire which connects the plural light sources and a flexible light penetration coating layer which seals the light sources and the wire.