Gieseman Matrix II T5 Fixture

Giesemann Matrixx II T5 Fixture


The Ultimate A Class T5 Lighting Fixture

The Giesemann MATRIXX T5 fixture offers an attractive mix of high-level output, value and impressive elegance. Available in a bluetooth controllable MATRIXX DIMTEC DIMMABLE T5 fixture. Offered in diamond black or pure gloss white.


The Latest in T5 Lighting Innovation

For many people, the aquarium holds an intrinsic fascination of a colorful underwater world that looks as if it was lifted right out of nature. One of the most versatile ways of presenting your aquarium in a favorable light is with the brand new MATRIXX II... The latest in T5 lighting innovation. The Giesemann Matrix Series takes full account of your lighting requirements, accommodating fixture lengths, mounting option as well as an array of different colored Giesemann T5 Lamps.

"...the most versatile way of presenting your
aquarium in a favorable light..."


Style with Uncompromising Build Quality

The MATRIXX-II and MATRIXX-II DIMTEC use an outer chassis constructed of heavy duty extruded and formed aluminum alloy and all the components are hand assembled before being topped off with an exquisite upper glass panel.

The outer chassis is also coated in a tough anti-corrosion anodized silver finish, or painted in high gloss pure white. Each element that makes up the outer chassis is painted or anodized pre-production to ensure that all faces (including joints and internal faces) are completely protected to limit salt or water ingression to reduce the risks of corrosion over extended use even in the most demanding situations. A high quality acrylic splash screen is used to ensure both the tubes and high-efficiency reflectors are protected from splashing or spray from air stones or surface-located pumps.


Looking Beyond the Surface

Where many manufactures often use cheaper ballasts and other materials to keep costs down, Giesemann understand that price is nothing without reliability. Each MATRIXX-II and MATRIXX-II DIMTEC is assembled using only the finest quality materials, from lamp holders and wiring right up to the high-quality German-made Phillips ballasts that are chosen for durability, stability and reliable output.

Each T5 lamp seats within a dedicated highly polished aluminum reflector that is 99.8% reflective and profiled to offer the very best possible transfer of light evenly back to the aquarium. Each MATRIX fixture is capable of lighting aquariums up to 30" deep while running cooler than metal halide lighting. The MATRIX fixtures can be can be easily configured to any desired color temperature by simply changing individual lamps. 


Keeping Things Stable

When designing any light fixture, temperature control is a crucial factor to not only maintain lifespan of the components and lamps, but also to maintain output performance. If ran too hot, the lamps lifespan and output is reduced costing the user money. If ran too cold, the lamp won't reach optimum operating temperature resulting in lowered performance.

The MATRIXX-II and MATRIXX-II DIMTEC use both passive and active cooling.*

Passive cooling occurs by direct heat transfer to the aluminum outer chassis and upper glass panel that acts as an inbuilt heat diffuser. Active cooling and air circulation is provided by two inbuilt super quiet fans. Due to these extra details in craftsmanship, the MATRIX-II and MATRIXX-II DIMTEC run at the perfect operating temperature, ensuring good lamp lifespan and optimum output.

*Matrixx II 4 tube version has no fans and uses active cooling only.


Control With Ease

Depending on the number of tubes in the unit, the standard MATRIXX-II comes with separate power cords to control groups of lamps. Independent times can then be set to recreate sunrise/sunset by way of using simple segment or digital wall timers, or an aquarium controller switchable plug-bar to control each bank of lamps.


Unlimited Control by DIMTEC Technology

Just like the FUTURA-S, the MATRIXX-II DIMTEC use class-leading control software which takes what we know about T5 lighting to another level.

The DIMTEC incorporates full Bluetooth connectivity to a range of devices including MAC/Windows PC, smart phones and tablets running Android software. Create full "dawn-to-dusk" effects with smooth transitions, lunar cycles and weather simulations.


Standard Non Dimmable Matrix II T5 Lighting Fixture
GM-MTX504 25.6in 4 x 24 W 24in 22in 25.6 x 10.24 x 1.78in 98 Watt 
GM-MTX604 37.4in 4 x 39 W 24in 22in 37.4 x 10.24 x 1.78in 159 Watt
GM-MTX606 37.4in 6 x 39 W 24in 22in 37.4 x 17.13 x 1.78in 238 Watt
GM-MTX704 49.2in 4 x 54 W 24in 22in

49.2 x 10.24 x 1.78in

221 Watt 
GM-MTX706 49.2in 6 x 54 W 24in 22in 49.2 x 17.13 x 1.78in
329 Watt
GM-MTX708 49.2in 8 x 54 W 24in 22in 49.2 x 17.13 x 1.78in
442 Watt 



DIMTEC Controllable T5 Lighting Fixtures
GM-MTX614 37.4in 4 x 39 W 24in 22in 37.4 x 10.24 x 1.78in 159 Watt
GM-MTX616 37.4in 6 x 39 W 24in 22in 37.4 x 17.13 x 1.78in 238 Watt
GM-MTX714 49.2in 4 x 54 W 24in 22in 49.2 x 10.24 x 1.78in 221 Watt 
GM-MTX816 49.2in 6 x 54 W 24in 22in 49.2 x 17.13 x 1.78in 329 Watt
GM-MTX718 49.2in 8 x 54 W 24in 22in 49.2 x 17.13 x 1.78in 442 Watt 


AVAILABLE COLORS: Black or Pure Gloss White 

Recommended "standard" configuration for the T-5 colors would be the following:

MATRIXX 4: 2 x actinic-blue; 1 x aquablue-coral; 1 x aquablue-azure

MATRIXX 6: 3 x actinic-blue; 1 x aquablue-coral; 1 x aquablue-azure; 1 x super-purple 

MATRIXX 8: 3 x actinic-blue; 2 x aquablue-coral; 1 x aquablue-azure, 1 x super-purple, 1 x super-actinic


My T-5 Lamp(s) will not start or dim properly, is this an issue with the dimmable fixture or the bulb?

There are some options that could cause the bulbs in a dimmable fixture not to start or dim:

  1. Not respecting the "burn in" time. A T-5 bulb in a dimmable fixture needs to be burned in. Reason is that the bulb(s) need the full energy of the ballast for a few hours to be prepared to work as well with low dimming intensity. This is why all Giesemann dimmable fixtures have an additional notice, informing people to respect the burn in time for the first 40 hours running. This is a requirement for all T-5 bulbs and has nothing to do if customer is using a Giesemann or other brand T-5 bulb. If a T-5 bulb is not "burned in" properly it might not start at the lower power stage and causes general problems by dimming these bulbs. Even ATI points this out in their instructions.
  2. Bad batch of lamps - Each Giesemann ballast is controlling two T-5 bulbs. Even if one bulb is not working properly (or damaged) the ballast will shut off the complete circuit (both lamps).
  3. Bulb not inserted correct - bulbs needs to be put into the lamp holder and turned by 90°. It is rather common to forget to twist the bulbs and as a result there is no electrical contact to ignite the bulb.
  4. Programming issue - Check if the bulbs are working in the manual dimming mode, by sliding the controller for each T-5 channel
  5. Using very cheap T-5 bulbs- many lower quality bulbs may not be capable of dimming: Usually higher quality bulbs are dimmable, but we can not attest for other companies bulbs and why we suggest the use of Giesemann lamps. 

Aren't Fans Necessary for proper color and life from T5 tubes?

Todays t5 tube normally produce their optimum lumen output at higher temperatures compared to older technology T8 tubes which typically produce their highest output at 25°C.

A recent study by Giesemann showed that the optimum ambient operating temperature for T5 tubes was found to be at around 35°C, a much more realistic operating temperature for a reef tank luminaire and the temperature that the new MATRIXX with its passive cooling technology is designed to run without the use of active cooling fans. Nevertheless, each MATRIXX II 8-tube version is equipped with 2 noiseless fans on top of the glass panel.

Equally tubes that are cooled to temperatures below the optimum also suffer a lumen output that’s lower than expected. The MATRIXX lighting unit also incorporates extremely efficient reflector technology meaning that more light is reflected into the aquarium rather than back at the tube. Light that’s reflected back at the tube can increase its working temperature resulting in reduced lumen output.


Customer Reviews

1 Review "Giesemann Matrixx II T5 Fixture"

A work of art.
David April 10, 2015
I purchased the Matrixx II to replace a ATI power module T-5 fixture. The Matrixx is the best looking fixture I have seen yet for T-5, it is a work of art. Mine is white with a piece of black glass on top of the fixture that adds some class.
This fixture would look very good over a Elos or some other rimless tank.
Mine is a 6 lamp version. It has a ballast for each pair of lamps. So that is 3 ballasts and each ballast has a separate power cord so each ballast can be controlled independently.
Reflectors seem high quality.
It also has a separate power supply for the fans. The fans are very quiet..
You have to remove the side of the fixture to replace lamp or remove lens. This seemed odd at first but it makes it easy to replace the lamps.
I am very impressed.

Thank you Coralvue..

Write Your Own Review

Only registered users can write reviews. Please, log in or register