A reader offers some help to others:
I read your snippet on the effects of blue light with interest, as my partner has Delayed Sleep Phase Disorder. We have a whole system in place at the house for the timing of optimal lighting. This includes blue LEDs pointed at him during the day and software applications to reduce blue lights on all the media screens at night. F.lux reduces blue light in your computer/iDevice screen according to your time zone, while Twilight for Android does the same thing for your mobile. So when I’m reading the Dish late at night, I now don’t have to worry that it’s corrupting my circadian rhythm as well as my mind.
The Dish 