ZooMed Ultrasun Trichromatic 34″ T5 39W Daylight Lamp
The Ultra Sun is a 6500K high-intensity trichromatic full-spectrum daylight lamp with a CRI rating of 98. It provides excellent color accuracy for optimal viewing of freshwater or marine fish and live corals, delivering a balanced spectrum of visible light and UVA. This lamp supports photosynthetic processes in plants and marine algae, making it ideal for freshwater and marine aquariums, including reef tanks.
Designed and manufactured in Europe, Zoo Med’s fluorescent aquarium lamps are known for superior color quality and extended burn life. The T5 39W model is energy efficient, offering up to $30.00 in annual electricity savings compared to traditional T-12 lamps. Rated for up to 10,000 hours of continuous use.
| Specification | Value |
|---|---|
| Color Temperature | 6500K |
| CRI (Color Rendering Index) | 98 |
| Wattage | 39W |
| Length | 34 inches |
| Lamp Type | T5 Fluorescent |
| Burn Life | Up to 10,000 hours |
| Application | Freshwater and marine aquariums, reef tanks |
FAQ
What is the color temperature of the Ultra Sun lamp?
The Ultra Sun lamp has a color temperature of 6500K, which mimics natural daylight and enhances color accuracy in aquariums.
How long does the lamp last?
The lamp is rated for up to 10,000 hours of continuous use.
Does this lamp support plant growth in aquariums?
Yes, the lamp provides UVA and a full spectrum of visible light that supports photosynthetic processes in plants and marine algae.

David Clarkson –
The colors of my fish look much more natural under this lamp. My corals have grown better since switching to the Ultra Sun. It runs steadily and doesn’t flicker. Very satisfied with the performance and color accuracy.
Maria Howard –
Great for my reef tank. The light is bright and even, and the fish seem more active. The CRI is excellent—everything looks vibrant and true to life.
Victoria Knox –
I’ve used this lamp for six months now. It’s reliable and provides consistent lighting. The only minor issue is that it’s a bit warm to touch after long use, but that’s expected.
Victor Davies –
Compared to my old T-12 bulbs, this one uses less power and lasts longer. The color rendering is outstanding—my live plants and fish look healthier.