[jrapdx3]

That thought occurred to me as well. Circadian phase delay already seems to be a problem re: the increasing brightness of our computing devices, almost all using LEDs.

New phones, tablets, TV's, etc. should come with a warning to keep them "dimmed down" in the evening, or better, keep use to a minimum late in the day. Sure, I know, the odds are about zilch people would actually heed such advice, but it ought to be out there anyway.

Another thing is the the relatively low CRI. For many purposes (industrial, medical, artistic) the spectral output of bright LEDs is far less than ideal. LEDs will probably get closer to "full-spectrum" over time, and no doubt will easily beat the discontinuous spectrum of fluorescent lamps.

LEDs now just need to get cheap enough, and really need to work with existing dimmer controllers.

[km3k]

Yes, but there are solutions for brightness/color at least for our smartphones and PCs.

Android: https://play.google.com/store/apps/details?id=com.vito.lux&h...

PC: https://justgetflux.com/

[tacoman]

CRI (or at least what's advertised) has really improved in the last year. It not difficult to find 90+ bulbs at places like Home Depot.