The duallite EV4D is a 2 head LED emergency unit in White. This EV4D is damp listed. It is designed for reliable service and a fast, wall mounted installation. This EV4D features a lightly textured White finish and a UV stable thermoplastic, flamerated housing. This unit is designed to provide 90minute emergency lighting. It comes with nickel metal hydride (nimh) battery and microcontrolled pulse charger. The ev series provides bright illumination through the use of 2 high power leds. The position of each fully adjustable lamp head is maintained by a reliable friction fit design. This EV4D in particular has a 4Watt capacity.Duallite is a subsidiary of Hubbell lighting, a leader in the field of indoor and outdoor lighting.