Energy Saved, Sleep Lost: The Unintended Consequences of LED Lighting
Almost separately from the circadian-rhythm concerns from the article, a major design peeve of mine are random products that have unnecessarily blinding blue LEDs.  Worst example I know of: an otherwise competently executed automatic HDMI switch with several incredibly bright blue LEDs, always on.  So bright as to be able to read and see all objects in the same room.  So when you might dim the lights to watch something?  The switch is still blinding blue, usually right at the viewers!I mitigated this by disassembling the switch and installing some 3-stop ND (neutral density) lighting gel to dim these stupid LEDs to acceptable levels.  This product at least afforded a good-looking solution -- many can't be disassembled to fix the problem.See also: Dyson rechargeable vacuum cleaners.Maybe it's time for an LED shaming tumblr...