SunSun UV-C 18W Replacement Bulb – G11 4-Pin UV Lamp

The SunSun UV-C 18W Replacement Bulb is a high-quality replacement lamp designed for 18W UV-C sterilisers. Compatible with SunSun UV units and most other 18W UV-C sterilisers using a G11 4-pin fitting, it emits 254 nm UV-C light, the optimum wavelength for controlling suspended algae, harmful bacteria, and other microorganisms in aquarium and pond water.

The bulb is built for reliable, long-lasting performance with a maximum service life of 10,000 hours. Even after 8,000 hours of operation, it retains approximately 85% of its original UV output. For maximum sterilisation efficiency, it is recommended to replace the bulb every 10–12 months, as UV-C intensity naturally decreases over time even though the lamp continues to illuminate.

Key Features

• Genuine 18W UV-C replacement bulb
• Compatible with most 18W UV-C sterilisers
• Standard G11 4-pin fitting
• Emits 254 nm UV-C germicidal wavelength
• Helps reduce green water, algae, bacteria, and harmful microorganisms
• Maximum service life of 10,000 hours
• Retains approximately 85% UV efficiency after 8,000 hours
• Easy to install replacement lamp

Benefits

• Restores maximum UV steriliser performance
• Helps maintain clear and healthy aquarium or pond water
• Supports effective algae control
• Reliable, long-lasting operation
• Suitable for a wide range of compatible UV-C sterilisers

Replacement Recommendation

For optimum UV sterilisation performance, replace the bulb every 10–12 months, even if it still produces visible light, as UV-C output gradually declines with normal use.

Technical Specifications

• Brand: SunSun
• Product Type: UV-C Replacement Bulb
• Power: 18W
• Bulb Base: G11 4-pin
• Wavelength: 254 nm
• Overall Length: 22 cm
• Maximum Service Life: 10,000 hours
• UV Efficiency After 8,000 Hours: Approximately 85%
• Compatible With: Most compatible 18W UV-C sterilisers