LSE Lighting Combo Package UV Bulb and Quartz Sleeve for Emperor Aquatics 20025 Combo Package Kit: Includes the following: 1 Bulb and 1 Quartz Sleeve Lamp Type: UV Ultraviolet, Sleeve Type: Quartz Glass, Base Type: 4pin (4pins on ONE END) Brand: LSE Lighting This combo package kit by (LSE Lighting brand) is 100% compatible replacement for use with Emperor Aquatics 20025. All lamps/quartz sleeves listed are compatible brand (LSE Lighting) UV products. We do not sell Emperor Aquatics UV brand lamps/quartz.