LEDs now are standard on PitBull Safety-Loc and Safety-Loc SLP vehicle restraints, Safety-Chock and Universal Truck Chock wheel restraints, and MLS and ALS Light Communication Systems. Boast bulb life up to 100,000 hrs., or 11 yrs., using 90 percent less energy than incandescent bulbs. Withstand shock and vibration, and tolerate heat, cold, and moisture. Enhance docking area visibility in rain and fog, even in direct sunlight. Serco Co., Carrollton, TX