I've just bought and installed Kichler street lights and found that I want to replace xenon bulbs with LEDs. I was concerned that the 4 watt LEDs might be too bright for my application since they have a smaller footprint and the lighting paths are only four feet apart, but they work pretty well. Can't comment on durability as they've only been installed for two weeks, but the bulbs look and feel good. They fit well, none of the eight bulbs were broken and I love that the plastic case keeps rain and snow out as my street light isn't fully closed (only the cover, the bottom is open).