Hey, just a thought, but maybe the solar lamp shouldn't require an entire solar panel?
Each solar panel makes 60kw, while the lamps only use 5kw. Maybe have it just use 2 copper, 2 steel, and 5 electronics or something like that? That's the adjusted 'solar panel' resource requirements, so it accounts for the amounts you would need, but makes them more proportional. The resources are a little of it, but that 10s crafting time added to each lamp makes them a pain to use.
