LSE Lighting compatible UV bulb UV425 for Abatement CAP500 CAP500-UV Brand: LSE Lighting Bulb Type: Ultraviolet Germicidal Bulb UV-C 254nm - Base Type: 4pin (4pins on ONE END) Warranty: 1 year [recommend to replace every 12 month] - Length: 16" - Effective Hours Rating: 12,000hrs Application Used In: HVAC and Central Air Purification Systems - Cross Reference Model # for compatibility purposes: UV425 This UV replacement lamp by (LSE Lighting) brand is 100% compatible for use with Abatement UV models CAP500 CAP500-UV CAP500-UVP