Have fun with the light and glad I could help. This Nichia 219c 5000k is a wonderful LED without any nasty green tint. Please note because Wurkkos TS21 has such a small body (small thermal mass) it heats up quickly and becomes dim very quickly in stock form. Therefore it’s great that it has a UI that gives owners the option to a. set correct current temp and b. raise the maximal thermal limit. Please keep in mind the light will become hotter if you raise the thermal limit so take appropriate precaution so it’s not turned on accidentally while in a bag etc. and causes burn/fire.
Once you’re in thermal configuration mode as outlined below, first flash is for setting Current Temp (same as room temp, for example typically 21 C inside my house in LA), and second flash is for setting Temperature Limit, where you would click for example 25 times if you want to set 55 Degrees max (stock is 45 Degrees). For me, the determination of which is the FIRST flash and which is the SECOND flash was the most difficult part when I was new, but became much easier with practice. It did help to dim the flashlight before going into setting so the flashes are easier to look at and temperature doesn’t rise so much during calibration.
If you are new to flashlights (pardon me if you’re not), you might want to check out the magic of Convoy lights with Nichia 219b 4500k (for the best beam color on the internet lol), and Getian GT-FC40 4500k (for being the only thrower with “world class” CRI & beam color currently available on the market). They are my most favorites among all the lighs I have. Hope this helps and makes the hobby more fun for you. :+1: 