I have taken time to buy this lamp, too little information, comments etc. Still, I am very often in North America and I suffer from the autumn depression (yes really, night falls, I cry). It helped me a lot for both situations. Only downside: it takes 45 minutes and the battery holds about that time. So remember to recharge after each use if you do not want to have the cable during use (and have a sufficient number of adapters when traveling).