So we ordered some new exterior light fixtures for our house. Our old ones fully enclosed the light bulb, but these new ones are "barn" style where the bulb is under the fixture but technically open to any elements that may blow up into it. Our house faces north. My question, maybe a really dumb one, but I've never encountered this....Do I need to buy special outdoor bulbs? I don't know if they need to be better protected/waterproof? The site we bought the fixtures from just says 120v wattage, E26/medium bulb base. Thanks in advance.