The interior lights in the S60 DIM slowly when turning off/on. LED's don't DIM as soon as the current drops a little they will just go off. I also belive dimming LED's can damage them. Some are clever - not just a single LED but the "bulb" is made up of several LEDs these appear to DIM by turning off some of the LED's. They don't come small enough for what your after though. So yes you can replace them yourself but I wouldn't advise LED's Vipes