Here is another single datapoint (but supported by a peer-reviewed paper!): I just bought blue light blocking glasses which I put on at around 9 or 10pm every day. They look goofy but it seems to actually work! It’s like a real-life Flux app. I seem to fall asleep much faster and it seems that the bright bathroom light does not to make me as alert anymore.
I cured my insomnia by replacing white compact fluorescent lamps with amber lamps from http://lowbluelights.com. An old comment on this (I have made too many comments here--it's a disgrace!): https://news.ycombinator.com/item?id=6495358