Traffic Supply, Inc. stocks the three-in-one Y2K barricade light, by Empco-Lite.  This durable LED barricade light is made in the USA and features a strong plastic case, an impact resistant lens and is powered by four d-cell batteries.  The light has three functions; off, flash and steady burn and a photocell to ensure long battery life.  Our testing shows that you should expect about four months life from a set of batteries in the normal flash mode.  The high quality construction of this LED light will hold up well to the abuse a barricade light typically receives.