So, there&#x27;s this: <a href="http:&#x2F;&#x2F;what-if.xkcd.com&#x2F;145&#x2F;" rel="nofollow">http:&#x2F;&#x2F;what-if.xkcd.com&#x2F;145&#x2F;</a><p>But there&#x27;s also TheSpiceIsLife&#x27;s opening comment which says:<p>&gt; ...you&#x27;re increasing the surface are of the collector so the 1.366kWh &#x2F; square meter still stands.<p>It feels like your second sentence<p>&gt; ...[H]owever you can use reflectors in the spectrum that your solar panel operates in to increase the energy available for capture at a focal point.<p>plays rhetorical games by ignoring the existence of large parts of your solar collector (namely the reflectors) in order to arrive at an inflated energy density figure.