We have 7 solar lights on the boat, one old one, 10 years old actually, that is still going strong, four plastic black ones, and two , very cute little glass balls, they make a beautiful pattern on the deck every night, i bought them in Australia, and yes, they are glass, which is not such a good idea, but i keep a close eye on them, and they are not in the way .
All of them hang on the lifelines, so at night, the whole boat has light, when she bobs up and down, the lights make a circle pattern from a distance and folks know its Curtsy out there!!

one of my little Aussie solar lights.

At sunset, Bert relaxing on deck.