I replaced every interior light that was not LED, except the vanity lights on the visors, using non-resistor LEDs... I guess there was enough load with everything on to keep the circuit happy. (Used 6000k temp to match the blue OEM ambient lights... Personal preference only).... No problems in two years... However, with LEDs in the f&r dome/map lights you wil notice a stepwise decrease in brightness on close scrutiny as opposed to the smith dim-to-off of incandescents.