This Web site describes a facility for plant photobiology research at the University of Helsinki, Faculty of Biological and Environmental Sciences, Organismal and Evolutionary Biology Research Programme. It has been developed by Pedro J. Aphalo. The growth chambers have been bought with funding from the Faculty, as well as major pieces of measuring equipment. Separate LEDs, including special ones and smaller pieces have been bought with research project funding granted to Pedro J. Aphalo and T. Matthew Robson, leaders of the SenPEP and CanSEE research groups.