Why are my images printing dark in comparison with my screen?
Profiling and Calibrating FAQ's -
If you notice you are getting dark prints, the first thing to do is a nozzle check. Once you are happy all nozzles are firing correctly, then check that both your printer profile and screen calibration are up to date. If your profiles are up to date but your prints are still too dark, it may mean that your screen is just too bright. To get around this, print out an image and then bring the brightness of the screen down to match the print.
Most modern day screens come set up at 300cd/m2 (luminance per square meter). The recommended brightness to have your screen at is between 80-120 cd/m2 depending on the ambient lighting in the room you are working in.
The brighter the room, the higher you can have the luminance of the screen, so a lot of the time the screen is just giving off unrealistic levels of brightness.