18 Watts, High-efficiency ultra-violet bulbs with 8,000 hour life. Replace after 11 months of continuous operation. Fits TetraPond Green Free UV Pond Water Clarifier.
- UV bulbs clarify water for clean, healthy ponds
- High-efficiency bulbs last up to 8,000 hours with continual use
Made by Phillips, these PL-S, high efficiency ultra-violet bulbs have an 8,000 hour life. These bulbs should be replaced after 11 months of continuous use.