This math is incorrect. Look at the wikipedia article percentages - each one is a percentage of the preceding one, not of the total light hitting (if you add u

This math is incorrect. Look at the wikipedia article percentages - each one is a percentage of the preceding one, not of the total light hitting (if you add up the percentages, they sum to way more than 100%). The 24% figure is 24% of 30% of 47%, or about 3% in actuality. 40% efficient solar panels also do not exist as far as I know (and are impossible) - I think the user is confusing other forms of solar energy collection with photovoltaics. See my other answer below for a better breakdown.