Surface mount design eliminates the need for large hole cutouts in trailer ceiling Lens design recesses lens into housing, to prevent damage from impact LED are fully encapsulated in epoxy to prevent damage caused by moisture and corrosives Not affected by cold temperatures, providing flicker-free lighting with a faster start-up time Ideal for refrigerated vehicles or those operating in cold weather Retrofit or replacement is quick and easy White housing design blends well with refrigerated trailer interiors Recommend 3 #10 machine screws for mounting, with torque of 15-18 in-lbs Available with integrated on/off switch as well as externally controlled version Solid-state LED design is impervious to damage from shock and vibration