HI, I have been doing a lot research into LED market and I am puzzled by how everyone and even the major lighting companies claim their light output compared to tungsten is so far off. For instance a common one I see is 100w(100w-135w) is a 1000w tungsten equivalent. From Arri all the way to the cheaper Aputure Lightstorms give a similar claim, but when you look at their photometrics and compare them they're more like a 300w tungsten equivalent.
I use Arri Photometric calculator to compare their classic 650w tungsten Fresnel to their own LED Fresnel series and everyone else's LEDs and it comes up consistently that around 100w LED is more like a 300w tungsten.
Is there something I am missing or is this just false advertising across the whole lighting industry to push LED? I also took into account beam angle when comparing the photometrics.