New EU regulation requires directional light sources and luminous flux to be measured within 90° or 120° cone. Luminous flux measurement is normally done at full 360° in all direction. However the new EU regulations (EU No 1194/2012) requires that directional lamps are measured in a 90° or 120° cone, meaning that only light illuminated in the cone is calculated efficient luminous flux.
The Viso Light Inspector software v4.2 now supports limited spherical measurements, making it easier than ever to test your light sources against the new standard.
The effect of normal 360° vs. 90° cone can be seen below.
The new regulation is expected to step into effect in september 2013.
More articles about new EU regulations