Is your phone actually ruining your sleep? Think again.

It's not the lighting industry's fault. As you so often see, scientists will overstate their case. What's essentially being said is that looking at a smartphone before you go to bed is going to disrupt your circadian rhythms.

Well, it won't. A lot of the studies that might suggest this are artifacts of keeping people within a laboratory. There's a lot of confusion out there — for example, the claim that the only important light for circadian regulation is blue light. That's just nonsense.