I really must plug the merits of the POUNDLAND colour changing solar powered floating lights in either butterfly or dragonfly designs.
I bought a load last summer at a pound each and they looked lovely. Scattered around the edge of the pond, not floating.
I took them out over winter and I'll be putting them out again soon. Everytime time I passed a poundland I bought 5 I think I've got about 90 at the moment!
Even through Winter there were the odd one or two I had missed would be glowing from under the grass....beautiful.