Why the strange design – doesn the spot beam come out as a half-moon shape?
A. Using half the reflector for the spot beam still gives a surprisingly good beam. The LED is positioned to give an approximately circular beam when shining on a flat painted surface, and which looks properly circular when illuminating rock underground. With a halogen bulb, there is usually one position of optimum focus, which sometimes ends up projecting an image of the bulb filament, and is sometimes an excessively narrow pencil beam. Away from that position, a halogen bulb tends to give a beam with light and dark rings. With an LED well-placed in the reflector, a beam equivalent to a good smooth halogen spot is obtained, with fair spread at a distance and excellent penetrating power. An FX2 with an X2 should give a beam that is both rather brighter and also somewhat better formed than an average halogen FX3 would, An FX3 with an X3 will be slightly brighter than an X2. Mounting the spot-beam LED pointing down into the reflector also ensures that the light which does not strike the
