ZooMed Coral Sun Actinic 420 Coral 18″ T8 15W
The Coral Sun Actinic 420 lamp emits strong short-wavelength light, peaking at 420nm, to support the growth of zooxanthellae algae essential for photosynthetic corals and invertebrates in marine aquariums.
This lamp mimics natural blue light that penetrates to reef depths, aligning with the absorption peak of chlorophyll for efficient photosynthesis.
Designed for reef tanks and marine aquariums, it provides high-intensity actinic light to promote coral health and vitality.
| Specification | Value |
|---|---|
| Wavelength Peak | 420nm |
| Power | 15W |
| Tube Size | T8 (18″) |
| Life Span | Up to 10,000 hours |
| Energy Efficiency | Energy saving compared to T-12 lamps |
FAQ
What is the peak wavelength of this lamp?
The peak wavelength is 420nm, which targets the absorption peak of chlorophyll for optimal photosynthesis in corals.
How long does this bulb last?
This bulb is rated for up to 10,000 hours of continuous use.
Is this lamp suitable for all types of marine aquariums?
Yes, it is ideal for all marine aquariums and reef tanks due to its strong actinic output and compatibility with photosynthetic corals.

Paul Harris –
I’ve used this lamp in my 50-gallon reef tank for over six months. The corals have grown more vibrant and the anemones are more active. The light is bright and consistent, and it doesn’t overheat the tank. Easy to install and fits perfectly in my fixture.
Emily Burgess –
The blue light is very strong and helps my corals maintain their color. I noticed a difference in growth after a few weeks. It’s a reliable bulb and lasts longer than the previous T-12 model I had.
Amy Hill –
This lamp provides excellent actinic light for my live rock and coral colonies. The 420nm peak is exactly what I needed for photosynthesis. It’s energy efficient and runs cool, which is great for long-term use.