When it comes time to replace your fluorescent light bulbs, check your fixture to ensure that you order the correct model. BulbAmerica also offers helpful videos that break down the key things that you need to look for when choosing bulbs. Double tube 2-pin G24d-2 bulbs are used in a variety of applications. If your fixture requires one of these types of bulbs, take a closer look at these available options to determine what will work best for you.