UVF861 FraudFighter Factory Authorized Replacement Bulb - Case of 10 Carton of 10 Replacement Bulbs especially tuned to the ballasts used in the FraudFighter UV-16 and POS15 machines The ONLY authorized Replacement Bulb for FraudFighter UV16 and POS15 High-efficiency Fluorescent Tubes operate at 30,000 Hz for maximum brightness High quality production enables as much as 3,000 hours of use Don't be fooled by unethical Chinese factories selling cheap parts. If you do not use the T5UV16-POS15 in your FraudFighter machines, your 5-year warranty will be invalidated!