15W 25W E27 Germicidal UV tube Lamp Sterilizing Led uv bulb 

1. Both wattage and voltage of the lamp use inductive ballast to measure, power-supply voltage 220±3V, frequency 50±0.5 Hz

2. When testing, the light tube should be in the horizontal position, and probe should be placed in the middle of normal distance, at 1 meter away. The settling time of lighting should not be less than 5 minutes before testing.

1-1  Appearance quality

1-1-1 Appearance quality of lamp is inspected by visual method or a vernier caliper of an accuracy ± 0.02mm.

1-1-2 Glass tube should be transparent, clean, straight, and should not have the defects, affecting the penetration of ultraviolet ray.

11-3 Lamp caps should be fixed on both ends of the lamp tube tightly and properly without any faults affecting the installments.

1-1-4 Lamp caps should be fixed on the lamp tube tightly and closely.

1-1-5 The material of UV germicidal lamps and quartz sleeve requires the quartz tube can penetrate through 253.7nm.