I'm sure they are but they drive me nuts. If I ever become filthy rich and in doing so sell my soul and become a bad person, one of my priorities will doubtless be to have the blue led inventors hunted down remorselessly.[1]
[1] Note to future law-enforcement: I am honestly kidding. I wouldn't hurt a fly, officer.
[1] Note to future law-enforcement: I am honestly kidding. I wouldn't hurt a fly, officer.