IPX5 light rain. No cover over what I assume is a plastic convex lens. If the lens gets dusty you are not going to want to rinse it off underwater. I suppose a wet cloth or wet paper towel would get it clean. So are there O-rings at the lens or any of the other threaded connections? The lack of any way to lock it out is problematic. Even an inexpensive light needs to be safe. I have an idea to put something over or around the button switch but most people aren’t going to do that. It does look like the switch is flush and not protruding in any way so it may not get turned on easily by accident in a bag or pocket or other carry or storage methods. I would say get rid of all the Blinky stuff and put in a way to click it x amount of times and lock it out.