SET of 2 GPH287T5L/4 14W UV Germicidal Lamp T5 tube, 4-pin base. Price for 2 lamps. * Power: 14 watts * Length: ~287 mm (11.3”) * Base: 4-pin (G10Q square) * Wavelength: ~254 nm (germicidal UV-C) * Typical life: ~9,000–10,000 hours It’s commonly used to kill bacteria, viruses, and algae in: * water filtration / UV steriliser systems * HVAC air purification units * pond filters or aquarium UV units