Placebos work great. I still dim and yellow shift all my house lights in the evening. I just like it. I think any effect is sleep hygeine based not from the colors having a circadian disrupting effect. Almost any pre bed ritual consistently applied can help.

Interestingly drugs must beat placebo to get approved. For unknown reasons antidepressants are getting less effective over time. Meanwhile placebos seem to be working better. Today most common antidepressants would no longer clear the hurdle to get approval.

For me, hockey would fall into the too exciting content being the cause of staying up.