[citation][nom]blazorthon[/nom]Not that I claim to be an expert or even well-informed in the subject, but I'd think that if what bit_user claimed is true, blue LEDs would be a greater issue than the monitor unless you stare at a nearly all blue screen with very high brightness.[/citation]While it's true that blue light is slightly more problematic, bright light of just about any kind will cause the same problems, and staring at a bright computer screen 2 ft from your face is definitely enough (keep in mind, white light includes blue light, so if you're looking at a mostly white webpage, you're getting tons of blue light anyway).
For the record, although I'm not an expert in the field I am well informed, and I know experts- one of the professors in my grad program discovered the cells in your retina that are responsible for photoentrainment (coordinating your natural circadian rhythm with external light cues).