== Stupid question? == 
 "The solar energy available, in watts per square meter, at any distance, d, from the Sun can be calculated by the formula E = 1366/d2, where d is measured in astronomical units." 
 The moon is 0.0026 AU from the earth, would this mean that if 100% of the sun light is being preserved, 1 square metre would optimally give 1366/0.0026^2 = 202 071 005 watts, or ~202 Megawatt? Isn't this relatively much for 1 square metre? I'm certain I'm just tired and did some stupid error in calculating...