Long Term Update:

Since the initial review, I now own 3 x Jetue21a in three different flavours (2200K, 3000K, and 4500K).
I have played around with the different TIR optics. My conclusion is the same as my original review, the 20 degrees more heavily pebbled TIR is the best optic to use. I find the 10 degree, although has a more defined hotspot, has noticeable tint shift around the beam. The 20 degree TIR has no tint shift and renders beautifully.

These little Jetbeams are my most used lights indoors :slight_smile: