In theory, a small portion of the UVA band of light could charge a solar panel. The UVA (315-400 nm) band of the UV light falls just within the Red visible light spectrum, it is possible that a small portion of that light could charge solar panels, but it would be significanlty inefficient. UV-A Blacklight with no filters on them are the only ones to use since they do not have a dark blue filter like other blacklight bulbs. Most UV light spectrum's wavelengths fall below the spectrum that solar panels presently use. The UV spectrum covers the wavelength range 100-400 nm and as we've spoken in other parts of our article, The most efficient form of visible light for power production is within the spectrum of violet to red, or the wavelengths of 380nm (violet) to 750nm (Red).