Surface mount design eliminates the need for large hole cutouts in trailer ceiling|White housing design blends well with refrigerated trailer interiors|Available with integrated on/off switch as well as externally controlled version|Lens design recesses lens into housing, to prevent damage from impact|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|Solid-state LED design is impervious to damage from shock and vibration|Retrofit or replacement is quick and easy|LEDs are fully encapsulated in epoxy to prevent damage caused by moisture and corrosives|Recommend 3 #10 machine screws for mounting, with torque of 15-18 in-lbs