I used these with an 18" LED strip on a Tucson tailgate glass - inside - and overnight the light strip fell off. 6 suction cups didn't hold. Weight, maybe due to the slight curvature of the glass. It might work better on flat glass than pickup. I also had to use a drill to open the holes wider to allow the screws to go through. Another mount. I ended up using an L bracket fitted with a light bar and screwed it into the top plastic panel. That worked much better. These suction cup mounts were useless for the rear window of my SUV model.
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