About leaving these things in the light. Some of them are intended to be left connected to the computer 24/7. The purpose to constantly read ambient light levels and make corrections based on that but it will degrade them faster but can help with some of the brightness issues being mentioned. I found monitors that were not able to bring their natural light levels up higher enough for the spyder series would over saturate the yellow channels to try and compensate. IPS vs TN panels Would calibrate differently because of their possible ranges.