title: Application of sunlight and lamps for plant irradiation in space bases.
abstract: The radiation sources used for plant growth on a space base must meet the biological requirements for photosynthesis and photomorphogenesis.  In addition the sources must be energy and volume efficient, while maintaining the required irradiance levels, spectral, spatial and temporal distribution.  These requirements are not easily met, but as the biological and mission requirements are better defined, then specific facility designs can begin to accommodate both the biological requirements and the physical limitations of a space based plant growth system.
authors.affiliation: Biomedical Operations and Research Office, J. F. Kennedy Space Center, FL 32899.
authors.forename: J C
authors.initials: JC
authors.lastname: Sager
authors.forename: R M
authors.initials: RM
authors.lastname: Wheeler
mesh_terms: D018504:Ecological Systems, Closed; D004867:Equipment Design; D008027:Light; D008029:Lighting; D017785:Photons; D010788:Photosynthesis; D010834:Phytochrome; D063245:Plant Development; D018521:Plant Physiological Phenomena; D010944:Plants / Q000528:radiation effects; D013026:Space Flight / Q000295:instrumentation*; D013696:Temperature
chemical_list: D010834:Phytochrome