Does changing headlights mean different bulbs?

If you change the look of your headlights, is the bulb still the same as your stock headlights? Or will the new headlight have different bulbs?|||Depends on what you get.|||Sorry I cant help you out with this one!!! Im a girl!!DUH!! GOOD LUCK THOUGH!!!|||I have no experience in changing from stock headlights to after market lights. I would have to guess that you are changing the design of the lamp and would have to change the bulb as well. Read the installation directions on your new lights, and if you do not get a satisfactory answer, call their tech support number.