Just like our automotive bulbs, our Hyperformance Interior Light series are efficient and long-lasting. You do not have to change them often unless it is to have different mood colours - which in fact they do come in several. Our interior lights are as easy to install as 1-2-3 and are ready to use immediately. check out our installation video here. https://www.youtube.com/watch?v=r7rhkPM_YLU