LOGISYS Computer CLK12RD 12 Cold Cathode Kit Light Specifications: Tube diameter: 3.0 mm Input voltage of inverter: 12 V Output voltage of inverter: 680 V Current draw: 5.0 mAv Tube length: 12 Inches Brightness: 28000 - 30000 cd/m² Lifetime: 30000 hours Parts: 90 days limited Labor: 90 days limited