The Fail-Safe Terrapin provides exceptional aesthetics with remarkablestrength. The wide variety of products allow an interior and exteriorarchitectural theme throughout an entire facility. Cast, extra-heavyaluminum walls of the housings offer rugged durability and affordefficient heat dissipation. AccUView UV-Guard coating protects the insideand outside of all UV stabilized polycarbonate lenses. The combinationof narrow prismatic blondels on the interior and a prescription texture onthe exterior of the lens provides exceptional lamp obscuration. LifetimeWarranty against breakage.