I got it from mountain electronics. 10158 Carclo - 60mm Ultra Narrow Catadioptric
Thanks! I knew Richard has them available but hoped for a faster European source.
Congratulations on the quick build! I totally missed this thread somehow. But I just now read through it. I like your design, although I agree that the heat sink could probably use a bit more exposure. A suggestion would be to turn it 90 degrees, so the fins run the width of the box rather than the length. Then cut some vent grooves in the adjacent sides to allow a bit more of a draft. I’m sure you’re ultimately right that it doesn’t need it. But it would still help a little I think.
Wow, I had the same idea too. But you made it faster. Nice light Kaybii. 3D printed casing?
[Clemence]