The 1.56 eV Iodine-Iodine and 2.00 eV Bromine-Bromine bond and their bond to
evaporated Tungsten atoms is broken on the solar heated filament.
A bank of these mounted on a panel rigged for solar tracking could be an OU device.
Some lamps have built-in Fresnel lenses.
Tungsten- External Metal X Thermoelectric conversion?
Frederick
