Lithonia Lighting TDD LED 1 40K 120 PE M4 Area LED Luminaire Area Light, Grey Die-cast aluminum housing has an impact-resistant, polycarbonate lens which protects the LEDs Sealed against moisture and environmental contaminants Exterior parts are protected by a thermoset powder-coat finish Protective polycarbonate lens covers the light engine's LEDs Light engine consists of two multi-chip, high-output LEDs