This product is rain-proof. But do not use in water nor spot strong water flows. Installed battery is for test only. Battery amount is not guaranteed. Lighting hors is calculated under general using condition. It differs depends on battery function and temperature.
I do not know how much runtime it will be because it is a single AA battery, but I'm glad if I always have it on all night. Fixed brackets are also easy to use, and there is not any particular dissatisfaction at the moment. Waterproofness is currently unknown.