Hi Fons, Would you happen to have a link? / Roger -----Original Message----- From: colorsync-users <colorsync-users-bounces+graxx=videotron.ca@lists.apple.com> On Behalf Of Fons Put via colorsync-users Sent: Monday, June 17, 2019 10:32 AM To: colorsync-users@lists.apple.com Subject: Re: ISO-3664:2009 illumination There’s nothing like a free lunch. Through OBA’s the paper industry succeeded to turn paper into mini displays (capture UV-light and emit as blue light). Lunch is paid by the energy of artificial light sources (OBA’s are not used for outdoor applications). Artificial light sources are further optimised, the presence of UV-energy is not required and OBA’s can become irrelevant. Anyway, for the moment we inspect and characterise viewing light by two measuring devices: - visual spectrum (380-730nm, 10nm interval, I1 or similar instruments) - UV spectrum (230-470nm, 0.5nm interval, Solascope) Normalizing the overlap of the two measurements towards the visual spectrum results in a single spectrum in the range 230 - 730) Best regards, Fons Put