You know, IP65 waterproof standard cannot guarantee protecting against “steam”.
Like our flood light, the front surface maybe over 60deg after turn on, while the back(heat sink) is suffering air-conditioned half day.
Our products/sealing ring are under thermal stress daily.
Therefore the “hi humility air/steam” goes inside the housing and tracked day after day if sealing ring damaged by the thermal stress.
Our engineer discussed with housing company and concluded that the best way is to add “glass glue” on the “sealing ring”, top & bottom.