Type C LED tubes utilize an LED driver to operate, similar to how a fluorescent T8/T12 uses a ballast. 8' Type C tubes come in single-pin configuration (Fa8 base). These 8' Type C LED tubes come in 3000K, 3500K, 4000K and 5000K. The 2-lamp LED dimming driver that operates these lamps allows for 0-10V dimming (0-10V dimmer sold separately).