I used them to light up a basement in an old house with 4 x 5 beams that wouldn't fit in a 6 inch box. They are bright, easy to install and appear to be well made. I put them in new construction jars that are firmly fixed. If you were going to use them with reenactment glass I would fit them into a mount first - they fit very snugly and require a lot of effort. They come with an E26 adapter which I don't need but will definitely save time on installation. Overall very satisfied. (Check prices at larger stores for something like this.)