hey man they are the same bulbs as the parking lights and puddle mirror lights on your car 194 will work the bulb it self i believe is a 4w the 194 is a 5w bulb. But if you are planning on putting led light in them go with these. I have them in my car and they are much brighter and are less watts so they wont burn out. plus it give off that hint of blue glo. I bought all my lights from them and they all look really good together.
as far a taking them off get a small screw driver under it and pop the clip on the inside of the housing closet to the middile of you car. don't be scared you wont break it.