I use these bulbs in my house because of the cost savings over time to operate them. Now I have found that they take a small amount of time to light...maybe half a second. I have found that they work very similar to a long white floresent bulb meaning that they are dim while they warm up and after a few minutes they put off their full amount of light. I have never had one burn out or give me any trouble. I like these bulbs and am very interested in what LED technology will do in a light bulb for my lamp.