Item Code: 54331 * One of the tubes is 10,000K and the other is Actinic 03! * The perfect solution for someone who only has 1 socket, and wants both types of light in their tank. * 10,000K color is high intensity "ice white" light. * Actinic 03 is real actinic with light emitting peak at 420nm. * German style straight pin (GY10Q). * 13" Overall legth.