Love these. Put these up with screw hooks (drilled in tiny holes first).  Thought originally that I bought too many but they look great (I drew out how far apart we needed to string them). We've had a lot of compliments and we use this room much more at night time. Make sure you put up the string before screwing in the lights though because if the lights fall or bang up against the wall they aren't very sturdy and stop working. Fortunately there are a bunch of extra light bulbs.