These lamps cost almost as much as some replacement lamps in stores. There were 15 lightbulbs in that box! Light bulbs don't break as easily as glass (although I did have a few internal breaks when my filament fell off. As you would expect with any light bulb. Glass would certainly break). They are dimmable. I recommend buying a kit that will allow you to remotely darken your strand. This is excellent value for money. And they're the right color, too (no ugly bright white LEDs).