Stays on top of my truck at 85 mph so that's good. It has multiple modes to change the light direction. I also included yellow and white lights in my video, but the light on the roof itself is quite bright. I want the All Lights On mode to be as bright as if they were blinking. The cord is not very long, although you will need to buy an extension cord for hiding the cord if you want to hide it and run it under the carpet/dash.
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