These are quite lightweight plastic. Mine didn’t come with instructions and I was baffled when they weren’t working, but I found the manual on lights.com and was able to get them going (the switch that has to be on to charge the battery is on the inside, and it is fairly alarming twisting the top off to get at I t.) The effect really is like a flickering candle (the photo is not nearly as nice as they are seen with eyes) and because they are light they won’t pull stakes over. So far I like them a lot.