Oh, so it's an UV LED, not an UV free white LED. Good to know. :) > You capture the spectral readings by default in chartread, and then use -fM2 > in colprof. I had to change "X-Rite i1 Pro 2" to "Xrite i1 Pro 2" for chartread (from ArgyllCMS v1.6.3) to recognise the instrument. I got this error otherwise: > colprof: Error - Unrecognised target instrument 'X-Rite i1 Pro 2'