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3. Test of ultraviolet wavelength range: 270nm-280nm 4. Sterilisation efficiency: continuous irradiation [water tank capacity (L) x 20] min, E. coli inactivation rate ? ? equal to 99.9%. Antibacterial effectiveness: irradiation per hour [capacity of the water tank (L) x5] per natural colony, less than 50 cFU/ml (within 200 hours) 1. Input power of the module: 0.8 ¡À 10% W UVC working current: 100 ¡À 10 mA 2. Test of UV light performance: when using an integrating ball, the UV light output is not less than 4 mW. 5. Life test: Input 100mA current at normal temperature. LED works continuously for 10,000 hours, power absorption less than 50%, no uncommon phenomena at other performances