I bought these to replace G4 20W halogen bulbs for landscape lighting. They emit no light and appear half as bright as halogens when illuminating leaves and rocks. They fit and work well, but just aren't bright enough to project from the projector's metal cone into the lights of Malibu. I've tried LEDs that just stick up and they'll work fine, but they won't fit in a Malibu cone so I'm out of ideas. In any case, there is nothing wrong with these LEDs. They work fine, just didn't do the job for my needs.