Rated as IP65 and very effective for a few weeks.
The body is aluminum, with a glass front held on with a light steel "clamp", this is fixed by four corner screws and as up to 15cm of the clamping plate is not under direct pressure from the mounting screws, water gets in and fogs the glass. The LED plate gives up after a month or so.
Silicone and Hammerite help, but I notice the fog has returned on a few, as well as rust on the steel plate [foil might be a better description].
I,m considering melting glue sticks in a metal bowl and immersing the edges of the lights so that the clamping plate and a small overlap up the glass are immersed. Does this sound feasible? I'm hoping that the molten glue will be a better water repellent than the liberal dollops of Hammerite I have been using. I am also hoping it inhibits rust more readily.