They are not very bright. I know they are not defective because they come in a pack of three. They're more for toys, but don't expect visibility or safety from them. Aside from not putting out a significant amount of light, they are expensive to use as they burn batteries. They use 2032 disc batteries that are used in car keys. Each light uses 2. They last about a week between each battery change. There are countless better alternative products out there. Please buy one of these. While they are totally ineffective for their intended purpose of visibility and/or safety, I gave them 2 stars instead of 1 because they are securely mounted and work in 3 different modes.
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