I've got one of these Logitech K750 keyboard with solar panels on it, but I really don't have sunlight in my computer room.
I take one of my desk lamps and move it very close to the top of the keyboard's solar panels. That seems to work pretty well since it has one an LED bulb. You probably wouldn't want to get it too close to an incandescent bulb because of the heat.
I also tried it with my solar ikea "sunnan" desk lamp to charge up the module. It also works with my solar keychain light.
Sure it's a bit inefficient but what do you do in the winter when the sun isn't shining?
https://www.quora.com/Can-you-charge-a-solar-cell-by-using-a-light-bulb-or-LED
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