I purchased this bar about a month ago. I chose to make this purchase to try to get a few miles to the gallon back by replacing my tall not very aerodynamic Guardian 175fpm light bar. Great bar, but was too tall and took too much electricity for my liking. I purchased this bar, and gained two miles per gallon back! This bar is extremely bright and very effective! It pulls less than half of the electricity that the Guardian did! If the magnetic version is purchased, it comes set to the default pattern w/no way of changing it. However, if you take the lid off and push the white/violet wire out through the power cord hole, you can change the pattern per the directions in the manual provided w/your new light bar. Purchase this light bar and you WILL NOT regret it! It was well worth every penny! Whelen once again out did themselves with another excellent product!