That's brilliant thanks!
On your bc40 have you noticed that the surrounding beam is slightly cooler than the centre spot's surround? I looked closely and it appears to be quite possibly the reflector edge or some of the yellow from the emitter surface reflecting to the edge.
On your bc40 have you noticed that the surrounding beam is slightly cooler than the centre spot's surround? I looked closely and it appears to be quite possibly the reflector edge or some of the yellow from the emitter surface reflecting to the edge.