ZooMed Reef Sun 50-50 Actinic & Daylight 24″ T8 17W
The Reef Sun bulb features a 50/50 combination of 6500K trichromatic daylight phosphor and actinic 420 phosphor, delivering high-intensity full-spectrum illumination. It provides strong light in the short-wavelength blue region, essential for photosynthetic corals and invertebrates. The balanced 6500K daylight enhances natural color rendering and viewing pleasure.
Designed for marine aquariums, reef tanks, African cichlids, and discus fish, this lamp offers reliable performance and long burn life. Made in Europe, Zoo Med’s fluorescent aquarium lamps are known for superior color accuracy and energy efficiency.
| Specifications |
|---|
| Color Temperature: 6500K daylight + 420 actinic |
| Lamp Type: T8 fluorescent |
| Wattage: 17W |
| Length: 24 inches |
| Application: Reef aquariums, marine tanks, African cichlids, discus fish |
FAQ
What is the difference between the 50/50 actinic and daylight combination in this bulb?
The 50/50 blend provides both daylight (6500K) for natural color rendering and actinic (420nm) light for coral health, supporting photosynthesis and vibrant coloration in reef environments.
Is this bulb suitable for a freshwater aquarium with African cichlids?
Yes, the Reef Sun 50-50 bulb is ideal for African cichlid tanks due to its balanced spectrum that supports their coloration and overall well-being.
Does this bulb have a long lifespan compared to other T8 lamps?
Yes, Zoo Med’s T8 lamps are designed for longer burn life and consistent performance, with energy efficiency that helps reduce annual electricity costs.

Sam Cameron –
The light is bright and clear, making my reef tank look vibrant. My corals have grown better since switching to this bulb. The color accuracy is excellent and the blue light is strong without being harsh.
Andrew Duncan –
Great for my African cichlid tank. The colors of the fish look more natural under this light. It’s a bit stronger in blue than I expected, but that’s good for coral health.
Victoria Anderson –
I’ve used this bulb for over a year and it still performs well. The light is even across the tank and doesn’t flicker. My anemones are more active now.
Paul Black –
The 50/50 mix works well for both reef and fish. I noticed better color saturation in my tank. It’s a reliable choice for a marine setup.