A segue from another thread: I know that LCD screens generate a degree of blue light, but where does it stand in comparison to LEDs? It seems that LEDs are getting all of the attention (justifiably, especially with the dawn of LED lightbulbs), and I know that LCDs emit enough to fiddle with circadian rhythms, but does it pose nearly the hazard that LEDs do? Does anyone have any hard data on LCD frequency vs. LED?