Easy to replace. Turn off the fridge. Remove the top safety glass shelf. You will find a phillips head screw at the back of the light cover. Unscrew the cover and remove the blown globe. Samsung recommends that a max 25w globe be used (however I was unable to locate this wattage. 40w was as low as I could find with the correct thread). Replace the globe light cover screw and turn the fridge back on. Note as I use the 40w globe the light cover does get warm however given that the fridge is only open for short durations I have not found this to be an issue at all.
Phillips head screwdriver (magnetized is even better)