I have a couple of reading lamps that use this type of lamp and I bought them to replace one of those blown bulbs. I hope they last longer than the previous one as it only lasted a few months. It wasn't the same brand as those replacement bulbs so I hope this brand lasts longer. They seemed a bit more expensive than the last ones I bought. I am happy with the quality of the light and the ease of changing them in my lights. Let's see how long they last.