We’ve had a SAD lamp before and it really did mimic dawn. You could also get it to play music from Spotify or one of the Dawn Chorus type inbuilt tracks etc so it was very effective for waking up and facing dark mornings.
THIS thing... barely lights up our room at all and has a bizarre feature of not displaying the time while the timer is set. So you set the “alarm” and it turns off the time display all night until after the light has come on and gone off?! If you wake before the alarm you will need another device to see what time it is.
There are definitely better products available if you want to combat SAD or simply prefer waking slowly to light. If you simply want a bit of light to help you get ready for an early start while your partner is asleep, or you just hate bright lights in the morning, this will do.