These put out VERY little light.  Decided they were useless for my purpose (over our outdoor seating area around a fire pit).  Put one string over the swings on the kids swingset.  Put the other set inside the fort part of the swingset.  The area inside the fort is probably 4'x6', and if you're standing more than 20' away, you cant tell its lit up at all.  Thats 10 lights inside a small area, with very little effect.  The light they put out looks NOTHING like in the pic.