Photopia is written and distributed by LTI Optics, LLC (formerly Lighting Technologies, Inc.) and was first released in 1996.
It has been used to design LED luminaires.,[1] solar concentrators,[2] and UV disinfection systems[3][4] , among many others.
Photopia has found wide use in the daylighting simulation segment of the market.
Photopia has a built in set of CIE Sky Models[5] for simulating the output of various daylighting devices, including light shelves,[6][7][8] glazing,[9][10] tubular daylight devices,[11][12] and solar concentrators[13][14] Photopia works on modern versions of the Windows operating system.
Photopia has a CAD system which is used for setting up simulations and viewing results.