re: Considering that the paleo diet is a bunch of bull, ...
Well, there is no single unambiguous paleo diet, and arguing about any which tend toward my characterization of "more paleo" is getting off-topic for this thread.
re: I'm not sure I should believe the rest of that link.
It wasn't written to enroll believers. It was written to provide keywords for searches, and motivation, so people could make up their own minds.
re: Dealing with lighting issues at night is important, ...
Just how important is not yet fully in focus, and while we're pondering, domestic night light is getting bluer, display gamuts are widening, and people are spending increasing amounts of time staring at color displays in bed.
re: ... but it's not going to cut the cancer rate in half.
I didn't say it would (although one blue light alarmist might so claim). I can confidently predict that controlling blue light at night will do very little for cancer in people who stay on consensus diets, which are full-time glycemic. Keywords to search on: Warburg, Seyfried, Cancer as a Metabolic Disease (don't expect to encounter any blue light connections on that topic, yet).