It likely don't matter much, but I like the Streamlight TL-2, LED. It is considered a "tactical" light, but for keeping in the truck, I like it a lot. It is a LOT better than the old 6-D Maglights...only exception is that ya can't use it as a club! I am not sure of all the watt, and lumen specs, but it's on the web. i think it runs about 40 lumens though..very nice choice if the weight and size isn't a big deal. It's about the size of a regular Scorpion Streamlight. Just MY $.02 worth.
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19+ years US Air Force. Heavy and Special Equipment Mechanic.