I was looking for LED bulbs for my cooker hood to replace the halogen bulbs that came with the kit. I found a few here but they are all longer than their halogen counterparts. Not sure why! The old halogen headlights were 34mm long, this one is 35mm long. Others were even longer, I don't think they fit any standard specification. I knew I'd have to swap out the clamps that hold these bulbs in place to handle the extra length, but this was the best match I've ever had. I managed to recreate 3 clamps with no problems, but the fourth one broke. I had to use a paper clip as a band aid, it's not an idea but it will just do the job. I spent a great deal of time installing them due to the size issue. I'm happy with how they look and love the fact that they don't feel very hot. Hope they last long.