We switched over a few years ago and haven't had to replace but maybe one of them out of the 15 or so we have in use. They do take a few minutes to "warm up" and put out the maximum light. I used to hate changing light bulbs in ceiling fixtures cause I am so short and it's getting harder to climb on a chair to reach.
I like using the older lightbulbs for making painting on and making Christmas ornaments out of them. I may have to take a trip and buy a couple of boxes to keep on hand for just that purpose. Thanks for the heads up!