The 'Wetherby Collection is designed specifically to withstand extreme weather and saline conditions.The Polymer body and polycarbonate diffusers are U.V. and impact resistant, and corrosion proof.The products are manufactured to IP44 rating and use Clic-Clac technology to allow installation. The twist and lock system allows multiple options e.g. the lantern bracket can be placed below or above the lamp housing to best suit your situation.