Wow, I love these and they are made of a solid hard plastic which I put them to a test and drove my car over one after I decided to line them alone the edge of my driveway, they nice and bright enough to be visible at night and once dawn hit they come on perfectly. one is mounted on the top of my mailbox and as I look out the window it is bright and my driveway is about 50 ft from the house. They are nice to have even if you want to line them along a flower bed in front of your home or alone the walkway depend on how you want them.