Yes, Disney not only allows lightsabers in its theme parks but actively encourages them as part of the immersive "Star Wars: Galaxy's Edge" experience. Guests are welcome to carry lightsabers purchased from Savi's Workshop or Dok-Ondar's Den of Antiquities, as well as those brought from home. However, there are strict safety and "show" guidelines. While you can carry them and take photos, "dueling" or aggressive mock-fighting is strictly prohibited to ensure the safety of other guests. If a lightsaber is too large or cumbersome, you may be asked to store it in a locker or have it shipped to your hotel. On high-speed thrill rides, you will generally be asked to leave the saber with a non-rider or place it in a designated storage area. At night, carrying a glowing saber is a popular activity, especially during the "after-hours" events. It is worth noting that while they are allowed in the parks, TSA regulations regarding lightsabers in carry-on luggage are generally favorable—they are considered "tools" or toys—but you should always check with your specific airline if you are traveling with a high-end, heavy metal hilt.