I saw the talk live and the nerdism, physicians humor and the transfered knowledge was really mind blowing. It's an awesome insight into the foundation and building of a really large human made machine. Watch!
After what I found the best ways to do this is to
a) find someone who sells it directly (cash <--> Bitcoin) or b) buy it de-annonymized and use a bitcoin tumbler for obfuscation.
I remember reading in some forums a while ago that the timeframe is somewhat in the range of 50-100y for recovering most of the waste. Probably they need another sarcophag inbetween ...
Two more situations where this spectrum and intensity is in use: on stages (music,TV) the old PAR lights are nowadays nearly fully replaced by strong led spots shining directly on the actors. Still you don't spend 22h on stage of course.
The other situation would be artificial gardening system where a heavy bended light spectrum is used to grow lettuce etc.