litebook and advice

hi!

i am not sure if i suffer from SAD or winterblues or mild depression or something else but i tried some lighttherapy last year and i feel i crave light around late afternoon, when it's getting darker these days.
so i looked into it and ordered a litebook elite. i anyone familiar with this type of light therapy? and does it work? my partner is a night owl and musician, travels alot, jetlags, sometimes it doesn't match with our lives. so i wonder if he could benefit from this too?

thanks,