Yes, Light bulbs are a source of light that works by incandescence. Even though both are in same catagory electrical bulbs are available with veriety of light producing technologies. Eg:Fluorescent light, LED, Halogen etc.
There is no difference between these two objects. They are different names for the same two objects. Both provide light after being placed in a light socket and connected to a power source. Electricity is the common agent used to power the two objects. Light bulb is the more common name of the two.