Yes, you can install an LED T8 tube lamp in regular fixtures, but it is essential to check if the fixture ballast is compatible with the specific bulb type. LED T8 Type A lamps, otherwise known as plug and play T8 LED lamps, are designed for use with the existing ballast, requiring no rewiring if the ballast is in good condition. In contrast, LED T8 Type B, also called T8 LED ballast bypass bulbs connect directly to line voltage. Using ballast bypass LED T8 lights eliminate the need to configure the T8 ballast with the T8 LED tube lights. A more flexible option is the dual mode LED T8, which works as a plug and play T8 LED tube initially but can later function as a direct wire LED T8 solution if the ballast is removed. All NuWatt LED T8 bulbs are type A+B, so you do not need to choose between T8 plug and play LED and a T8 LED bypass ballast. Note you should only install a T8 LED bulb in a T8 LED fixture, as T8 LEDs are not going to work in fixtures designed for other sizes. Also, always verify your fixture ballast and whether you have a direct replacement T8 LED bulb or a ballast bypass LED T8.