Can't confirm the suction power but overall the light is pretty good. Not as bright as I was hoping, but it's over. Most people don't know what a blinking light means and don't get out of the way anyway, so it's difficult to improve efficiency. I wish you could come up with a slightly longer cable. I melted the included brackets and sheet metal screws into the dome cover. It comes with suction cups that snap onto mounts, but I haven't used them. Overall, value for money seems excellent.
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