it's bright during the day and super bright at night just don't look at it when it's on or you'll see smudges as far as magnets go it's not a sucker anywhere I go, I was trying to get it out of my truck, I'd need a pole to pry it off. Only guess is they get rid of the switch that changes the flash patterns and make a box that shows your flash mode, so no it has to get off the truck constantly which it does, it's actually brighter than major freeways, plow trucks, his guardian
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