That's a very interesting article Rollo, thank you for posting it.
However it is dated January 2018, that's about 18 months out of date, which in the white heat of technology is significant.
It reflects (I punned!) my experience of my first LED bulbs. Rather pale and not focused. I also took the advertised claims with a pinch of salt when I bought them, but I stuck with the project and the ones I am using now are very impressive and do now exceed the output of halogen bulbs.
Interesting though how different the cut off and step are with the same bulb in different reflectors. you really do have to experiment to get the result you want.
Looking forward to seeing the pics of your beam Jez..
