The industrial steel emergency unit from Lithonia lighting is ideal for new York applications where steel housing is required. Made out of 20-gauge steel and with two lamp heads, this unit with a 6 volt, 18 watt lead-calcium battery is able to provide emergency light for up to 90 minutes after loss of power. To help lower energy costs, the light has current-limiting charger maximizing the life of the battery and lowering energy consumption.