I just bought one of those Phillips wake up lights. Only been two weeks, but now I have way more energy in the morning, usually enough to get up and do 30 min o

I just bought one of those Phillips wake up lights. Only been two weeks, but now I have way more energy in the morning, usually enough to get up and do 30 min of exercise and be finished before i had previously finished dozing. I find I am slightly awake 15min into the light cycle, and fully away 25 min in ( 5 min before the alarm actually goes off)