Sunlight is continually directed onto High Flux Solar Furnace (HFSF) concentrator array (10) by a tracking heliostat (11). Concentated sunlight therefrom passes through an attenuator (12) to a turning mirror (13) and then to an Irradiance Redistribution Guide (IRG), i.e. a secondary concentrator (14), and thereafter passes as uniformly concentrated solar flux to sample chamber (SC) for accelerated weather testing under controlled multiple concurrent temperature and relative humidity levels therewithin.
