Coralife UV replacement Lamp 18 watt – For Turbo-Twist 6x UV Sterilizer. Coralife UV replacement lamps are available for your Turbo-Twist. For optimal performance, it is recommended to replace your Turbo-Twist UV lamp after 4,000 hours of operation or every 6 months. Coralife’s Turbo Twist UV Sterilizer Lamp emits UV-C rays that control and kill single-cell algae, bacteria and parasites in your pond, helping to keep the water clean, healthy and clear. Replacement UV-C lamp for Turbo-Twist UV Sterilizer Suitable for Coralife Turbo Twist UV sterilizers & UV pond clarifiers UV-C rays kill & control single-cell algae, bacteria & parasites.