[Olreich]

The 2008 paper released by the DOE pegged lights at 6.63TWH per year across all segments in the US. That's 0.02% of electricity usage in the US at the time, which extrapolated is still only 44 TWH in 2008. With 100% LED lights, the usage would be 0.663TWH according to the 2008 DOE paper. I'd assume we aren't quite there, but even so, much more than 2-3 TWH on holiday lights nowadays would be shocking.

> Even if a billion households had 50 strings of LED lights each and kept them lit 24/7 for all of December, they'd still use less energy than the annual usage of Bitcoin.

On the final math, at 5 watts per strand, you'd wind up with 182.5 TWH. Bitcoin at 150TWH-250TWH puts it into the ballpark. Nice.