Yeah I also bought a "photo red" 665nm 1W diode after that last thread, stared at it occasionally at low power and never noticed any difference. I guess it's on

Yeah I also bought a "photo red" 665nm 1W diode after that last thread, stared at it occasionally at low power and never noticed any difference. I guess it's one of those things you gotta do for several decades and unless you leave one eye as a control there's nothing to compare to anyway.