Easy to use website and you had just what I needed. I'm a disabled swimmer and need to leave my walking stick in the reeds once it's deep enough for me to swim. Which is fine, until it starts getting dark early and I can't find it! This light clips onto the wrist strap on my stick, it works even if it sinks under water and provides a great marker to find both the stick and the entrance without being too glaring. I also found it helped while changing afterwards which was unexpected due to the green colour I'd deliberately chosen. In the photo it doesn't look as bright as it is in real life.