Quoting from Inova's own product description:

Ultrasonically-sealed polymer construction and recessed lamp design qualify the shockproof, water resistant 24/7 for extreme environments. (Emphasis mine)

Water resistant usually means it'll take a "splash", but not necessarily even partial submersion. I remember reading this somewhere, but don't have a reference handy... That's why I always try to get stuff specified as water proof, preferably with a depth rating, the deeper the bettter.