Grow Room LED Grow Lights

CoolStack® LED Top Light Greenhouse cultivation Passive cooled

The CoolStack® is a state-of-the-art high precision LED grow light for top lighting applications in greenhouses and grow rooms.
With a market leading output up to 1.950µmol/s it is the ideal LED grow light alternative for HPS SON-T lamps.

CoolStack® LED grow light

The CoolStack® is composed out of 4 individual CoolGrow® horti LED engines, each under its individual optic TIR lens.
By altering the lenses the light distribution can exactly be adapted to give the best fit for your greenhouse or grow room conditions.
The lenses are available in beam angles of 60 degrees, 75 degrees, 90 degrees, 105 degrees and 120 degrees, with specific beam shapes like batwing technology and high-technology features like anti-glare option which creates a higher level of comfort while working under the grow lights.

Your inputs with regards to the greenhouse or grow room practical setup in combination with the required PPFD light levels and spectrum is translated by our engineers to the ideal setup in a light simulation plan.
By achieving a good distributed light level over the crops with a beam as narrow as possible, you don’t only achieve a higher PPFD level from the same lamps, but also gain tremendous on crop penetration rate.

LED Grow Light Optical simulation

11 validated growth spectra ensure the right light composition for your crop and growth stage.
We combine both narrow band spectra of LED grow emitters with broadband spectra to create a maximal trade-of on efficacy in combination with a good workable visual spectrum for the people.All details about our spectra you find here

Last but not least, the CoolStack® is much more than just another LED grow light system.
Foreseen from the most advanced cooling system on the market, a high performance cooler with 16 heat pipes and a low-weight stack fin structure, the CoolStack® guarantees by far the longest life time ever seen in commercial grade LED grow lights – 75.000hrs!

It is also the first grow light system designed from a point of view of sustainability.
A lot will happen in the next 75.000 hours you deploy our CoolStack in your greenhouse or grow room – and one thing is for sure, the efficacy of the LEDs will keep on raising over that time while the prices will reduce.
That’s why we made the system upgradable by just changing the LED engines – in this way you can upgrade your system over time to the next level of efficacy for just a fraction of the cost!



  • Absolute market leading
    PPF 1.950µmol/s
  • Highest photon efficiency
    2.7µmol/J - 3.1µmol/J
  • 11 leading growth spectra
    with highest yields
  • Deepest canopy penetration rate


  • Freedom in growth spectrum composition
  • Upgradable over time
  • Unique light distribution
    with TIR lenses adaptable
    to your canopy


  • Extreme lifetime 75.000hrs - L90
  • 5 years warranty
  • Best thermal management
  • Full IP67 waterproof
CoolStack® LED Top Light
Light SourceCoolGrow® LED
PPFUp to 1.950 µmol/s
Input Power600W - 635W spectrum depending
Efficacy2.7 µmol/J - 3.1 µmol/J
Input Voltage90-305 Vac or 249-528 Vac
Fixture DimensionsW128 x L1180 x H154.5 (mm)
Weight8.900 gr
Thermal ManagementAdvanced heat pipe – passive
Dimming0 -10V, PWM, DALI, BLO Bluetooth, Synapse Wi-Fi or LAN
Light DistributionAdvanced TIR - 60˚, 80˚, 90˚, 105˚, 120˚
Lifetime75.000 hrs - L90
Power Factor>95%
Warranty5 years standard
Extended warranty 25.000 burning hours or 10 years whichever comes first if equipped with CoolControls® only

pdf-iconCoolStack® horticulture LED top light - Product Brochure