The original sensor UVN is only for UV-Radiation. The one modified by me is for global radiation.
I’m using a lightprobe like this one: http://www.conrad.de/ce/de/product/156518/Lichtfuehler-50-2000-Lux-Hygrosens-Lichtfuehler-wetterbestaendig-Lichtfuehler-wetterbestaendig
Regards