Not neccessarly stubborn as you can see yourself in my last post, just if i have to do with stubborn people too. Wrong maybe yes, but so far noone of them could explain my observation once i made. Where a defective IR diode had no IR output at all but still emmited some sort of visible light. Maybe you can explain as you are the one who showed me that i´m wrong and gave me a logical explanation for this i also can accept. Not like the others.