Recent purchase but have had several dark days in which to use the light. This is a beneficial lift-in-mood device.  (Checked with my opthamologist re: macular degeneration warning as stated in the warnings, but I am good to go! He felt that overall, this was a good item for me to use.) Addressed Christmas cards by the Happy Light and found other occasions...bill paying, recipe studies/consideration  and minor sewing repairs were done quickly and without drudgery.  Credit to the Happy Light!