How to distinguish LEDs CREE XM-L T6, XM-L2 U2 and XP-E Q5 visually (external differences)

Русскоязычная версия этого видео тут - https://youtu.be/v92LZZ0YyU8 In the video clip shown: 0:10 - External differences of the CREE LEDs XM-L T6, XM-L2 U2 and XP-E Q5 between themselves; 1:15 - The main differences between the technical characteristics of these CREE LEDs; 1:48 - How to avoid mistakes when choosing a LED flashlight; 2:33 - The most commonly used bases for these LEDs; 3:16 - The palette of the glow temperature of the LEDs.  More information about the marking of CREE XM-L, XM-L2 and XP-E LEDs and the palette of the glow temperature look here - https://youtu.be/4peGFsnER9Y How I got a fake XM-L2 LED in a flashlight - https://youtu.be/t55kcf0iGcA How I got a one more fake XM-L2 LED in a bicycle headlight - https://youtu.be/R9eYRaV2hsI   All your questions You can to ask in the comments and to write why You do like or do not like this video.  If you liked my video or it was useful - please click on "Thumbs up!" :) Also subscribe to my channel, I will add video in the same vein and other interesting things - https://www.youtube.com/channel/UCFwNDfXBS9mVsvSsYSojgFg?view_as=public