Surface mount. 18" x 5-3/8" x 1-3/4". Supplied with two F15T8/CW fluorescent tubes. Economy priced. Prepainted aluminum housing, acrylic diffuser lens, light output equivalent to 120 watt incandescent bulb. Efficiency: draws 2.2 amps at 12 VDC, 98 measured lumens per watt. Includes D-134CI lens and IB-116 inverter ballast.30 watts with Cracked-Ice lens and gold colored housing. Engineered for RV (Recreational Vehicle), marine, solar, reefer trailer, medical, mobile office and service truck applications.