Centium LED Driver Intended LED Usage LED Tubes Number of Bulbs Supported 4 120 to 277V AC Input Voltage 550V DC Output Voltage 0.61 to 0.10AAC Input Current 0.25AAC Output Current 71 W Input Power 9 to 34W Power Output 9 1/2 in Length 1 5/16 in Width 1 in Height Case Form Factor Long Standard Profile Class P