Hello ArgllCMS users, I have made satisfactory progress in profiling my digital SLR under daylight. Results are not so great however when using my profiles with fluorescent lighting and perhaps with other illuminants that are far from D50. I am hoping that photographing the IT8.7/2 target under fluorescent light might improve the results. Would I then still profile against the D50 reference data or use one of the alternatives? I have chart reference data also for F2, F7 and F11 illuminants. What are these used for? Stephen.