T8 fluorescent light bulbs are a type of linear fluorescent lamp with a 1 inch diameter. They are more energy-efficient and have a higher light output per unit length than T12 fluorescent lamps. T8 lamps use electronic ballasts, which are more efficient and produce less heat than magnetic ballasts. They are commonly used in commercial and industrial lighting applications, as well as in some residential settings. They are a good choice for energy-efficient, high-performance lighting.