Recently I bought some 5000k (the "k" is for kelvin, a measure of color temperature) full spectrum CFL lights for the den where I use the computer for photo editing. I found that after color calibrating the screen, colors look different in daylight and incandescent lighting (duh!) so tried the 5000k lights.
DW is okay with the lights but drew the line at painting the room 18% gray to avoid color contamination.
It's interesting. During the day the lighting color pretty much matches daylight but at night the difference is dramatic when going to a different room with incandescent lights. Initially the color shift from red/orange incandescent to the much more blue 5000k is dramatic but one adjusts to it. I definitely think it's a change for the better, DW is fine with them in this room but balks at putting them in the rest of the house.
I just wondered if anyone else had tried them.