Your figure for the energy from the Moon seems overstated. https://education.seattlepi.com/moonlight-strong-enough-power-solar-panels-4884.html https://educati

Your figure for the energy from the Moon seems overstated. https://education.seattlepi.com/moonlight-strong-enough-power-solar-panels-4884.html https://education.seattlepi.com/moonlight-strong-enough-powe... quotes a ratio of 2.3 million to one. However the key point is this. The Moon is in reality 400 times smaller than the Sun. Which means that an optimally placed lens can actually make the image of the Moon 400 times smaller, for 160,000 times as little area. If the lens is big enough that this target area is mostly losing heat through black body radiation, again it should wind up over half the temperature of the surface of the Sun. Which is more than hot enough to start a fire.