A convex reflective surface,such as minor (1) or an equivalentdeflector of radiation, designed to suit aparticular location or type of location,fixed in position and requiring no adjustment,can re-direct solar radiation(2,3) downwards onto a chosen targetarea throughout the calendar year orsuch lesser period of operation as maybe chosen, benefitting the growth ofplants in a greenhouse or the open air,and other human activities, at minimalexpenditure including of fossil fuel.
