The use of photovoltaic solar panels (and related generation of electric power) can be extended to a 24 hours per day under any environmental condition by equipping them with an artificial source of light, with emitting wavelengths matched to the photovoltaic solar panels, to be turned on in the absence of sunlight. This source of light can be obtained by heating a mantle to an incandescent temperature via the efficient, low polluting combustion of Natural Gas, Butane, Propane, or other gaseous Hydrocarbon fuel. ©1996 American Institute of Physics.