Dimmable SunPower
Dimmable SunPower fixture

Dimmable SunPower

T5 lighting with built-in control for proven coral growth and coloration

Dimmable SunPower PAR

Time-tested, proven results

The ATI Dimmable SunPower has been delivering proven results worldwide for more than five years. We recommend using ATI T5 bulbs in your fixture, which will help you produce significantly more light than most other T5 fixtures of the same size.

Light spread

The Dimmable SunPower produces an even blanket of light that bathes the entire tank in light, producing far fewer shadows and little-to-no hot spots. T5 lighting is uniform and intense, filling caves and overhangs and providing corals in darker areas of the tank the light they need to thrive.
T5 Light Spread 48"x24"
Dimmable SunPower active cooling system illustration

Active cooling system

Bulb life and bulb output are improved with our active cooling system to keep your bulbs at a more optimal operating temperature.

98% reflective miro-silver

Direct the light where your corals need it most with the 98% reflective miro-silver bent parabolic reflectors.


Simple and safe to use

Pick the T5 bulbs that are best for your needs, insert them, and plug in your fixture. ATI bulbs work in almost any combination to effectively grow corals, and since they’re not a point-source of light like LEDs, you don’t need to worry about adjusting different color channels, meaning there’s less risk of burning your corals.

Built-in control

With 10 individual set-points, the built-in controller produces much more realistic dawn-dusk and daylight simulations than non-dimmable fixtures. The controller automatically adjusts from one set point to the next making programming a breeze and eliminating any intensity jumps.
Dimmable SunPower control panel
Dimmable SunPower efficiency chart

Comparable efficiency

Our results speak for themselves. LEDs may have a great reputation for efficiency, but our T5 fixtures use a comparable amount of power. Make the switch with confidence.

Uniform light spectrum & output

The Dimmable SunPower produces a beautifully blended color spectrum, creating uniform light and color throughout the tank. A non-diffused LED fixture, on the other hand, produces district bands of colors resulting in uneven light and color throughout the tank.*
light on sand

Goodbye 'disco ball effect.'

LED disco ball effect
T5 blended lighting

The Dimmable SunPower uses T5 high-output fluorescent bulbs that are available in a variety of colors that, when combined, allow you to achieve a unique color to suits your aquatic life and personal preferences. These bulbs produce a blended spectrum directly over your tank. Whereas, many non-diffused LED fixtures* utilize various points of individually colored lights. When these lights radiate over your tank and hit the flowing water below, you may see what is commonly known as a ‘disco ball’ effect of colored lights and shadows moving over the coral and sand below.

* The use of LED light diffusers, like those found on the ATI Straton LED, will help produce a more uniform light spectrum and minimize the disco ball effect.

** These images are intended to represent the indicated lighting and are not actual tank setups.

plug & play

Plug & Play

Install bulbs. Apply power. Grow!



Fans are temperature controlled which typically results in a slower fan speed and less noise.

German made

German design & engineering

Made in Germany with USA support when purchased through an authorized ATI North American reseller.



1 year warranty summary.
Get warranty details →


Item #Description# BulbsLengthWidthHeightCapacity
ATI330124” 4x24W Dimmable SunPower with Controller423.1 in.9.4 in.2.1 in.20-50 gallons
ATI330324” 6x24W Dimmable SunPower with Controller623.1 in.13.4 in.2.1 in.40-70 gallons
ATI330524” 8x24W Dimmable SunPower with Controller823.1 in.17.5 in.2.1 in.50-100 gallons
ATI330736” 4x39W Dimmable SunPower with Controller435.0 in.9.4 in.2.1 in.40-80 gallons
ATI330936” 6x39W Dimmable SunPower with Controller635.0 in.13.4 in.2.1 in.60-120 gallons
ATI331136” 8x39W Dimmable SunPower with Controller835.0 in.17.5 in.2.1 in.80-160 gallons
ATI331348” 4x54W Dimmable SunPower with Controller447.0 in.9.4 in.2.1 in.50-110 gallons
ATI331548” 6x54W Dimmable SunPower with Controller647.0 in.13.4 in.2.1 in.80-160 gallons
ATI331748” 8x54W Dimmable SunPower with Controller847.0 in.17.5 in.2.1 in.110-220 gallons

In the box

ATI Dimmable SunPower T5 fixture

6 foot power cord

Adjustable ‘grip-lock’ style hanging kit

Get the best performance out of the Dimmable SunPower with ATI T5 bulbs.