I can tell a difference...
I've had this for a couple of weeks now.  After reading the research on the Internet about therapy light, I learned that it varies from person to person how much light is needed, length of time needed in front of it, as well as what time of day it should be used.  I read to use it within the first 30 minutes of waking up and/or throughout the day.<br /><br />The first day, I used it as I was applying make up and doing my hair (which occurred within the first 30 min of waking up).  I placed it on my vanity.  Thinking that I would benefit from continued use of it throughout the day, I unplugged it, and took it to work with me and placed it on my desk.  I felt more alert on the drive to work that morning.<br /><br />I left it at the office for the next week (so I didn't have it at home in the mornings), and used it the afternoons.  I felt no effect using it in the afternoons.  Remembering my first day of use and how my energy level had improved when I used it within 30 minutes of waking up, I decided to take it back home and try that again.<br /><br />I guess it works better for me in the mornings.  I'm in front of it for about 30 minutes.  I don't feel that I need additional afternoon sessions.  Everyone is different, so experiment with different times of the day and duration of exposure.
Rating: 4 stars