Open Industrial fixture. UL 1598 approved. Electronic Ballast. Even lamp spacing for optimum light distribution. Pre-wired with wire 5 foot leads for ease of wiring. Twist lock lampholders. Fabricated from pre-painted cold rolled steel, the Series 229H is ideal for a variety of industrial lighting needs. The Series 229H uses a 5 Ft. 3-wire whip which reduces installation time by not having to open the fixture.