Greenhouse LED Grow Lights

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CoolPack® LED Top Light Greenhouse & Grow Room Water cooled

The water cooled CoolPack® is a state-of-the-art LED grow light for use in both greenhouses as well as grow rooms.
In those lighted projects where the heat of passive LED grow lights becomes too much, a water cooled LED grow light can be the perfect outcome.

CoolPack® LED grow light

Why would you opt for a water cooled LED grow light over a passive cooled LED grow light

First of all you have to understand that not all passive cooled LED grow lights perform identical.
A LED grow light with an efficiency of 2.4μmol/J produces average 50% of light and 50% of heat, while a grow light with an efficiency of 3.5μmol/J produces 73% of light and just 27% of heat.
A tradition HPS SON-T grow light produces 35% of light and 65% of heat, where more specific the majority of the heat goes to radiated heat.

SON-T light/heat
LED 2.4µmol/J
LED 3.5µmol/J

With passive cooled or active fan cooled LED grow lights all the generated heat remains in the grow room.
In general with high efficiency LED grow light systems the relative low heat production has beneficial effects where the extra heat leads to more generative plant growth.

Still there are situations where the produced heat per square meter becomes too much to create a good plant balance, or where the grower wants to control the full climate in the room like for research purposes.
In these cases the water cooled CoolPack® delivers the perfect solution.

The generated heat is transported through a water piping system out of the lamp and out of the room, and after being chilled reinjected in the loop of grow lights.
Although the extra costs for piping and chilling the water, the CoolPack® also offers specific extra advantages over passive cooled LED grow lights:

  • Ultra-low LED temperatures lead to a long life time and low light decay over time.

  • LED temperatures.jpg
    Where most LED grow lights use simple cooling principles like a block of aluminum the heart of the CoolPack® is a sophisticated water cooling device.
    This technology guarantees you the best thermal management of the LEDs on the market.
    The light efficiency, the life time and the light decay (how fast or slow the light reduces over time) are all directly related to the LED temperature of the grow light.
    So with the CoolPack® which runs the internal LEDs as cold as possible, you as a customer obtain a grow light which lives longer, has a higher efficiency of light per watt and maintains his light at a higher light level over time.
    The CoolPack® comes with a life time of 75.000 hours L90 and a warranty of 10 years.

    36000h v.s. 75000h Lifetime

  • More compact lamp size than passive cooled LED grow lights

    As running water is the perfect conductor for heat, the overall design of the CoolPack® could be kept ultra-compact.

    The overall dimension are almost 40% smaller than most passive grow lights, what leads to a minimum of shadow on the crops in case of greenhouse installations.

    Two varieties of the CoolPack® are available, each with its specific purposes.

CoolPack® LE

up to 1820µmol/s from 530 watts
  • Equivalent light level as a
    1000W HPS SON-T with 47%
    less energy
  • Best deal for energy saving

CoolPack® HO

up to 2070µmol/s from 600 watts
  • 12% more light and 40% energy
    saving compared to a 1000W
  • Best deal for more light with
    less energy

The ideal light distribution per crop with intelligent lens beam angle design

When your grow room is equipped with a minimum number of grow light fixtures, light distribution and light penetration in the plants becomes a point of attention.
Just spreading the light in the widest way is of course the easiest solution and gives in many cases a good even light spreading, but is far from ideal with regards to light penetration in the depth of the crop.
Plant trials over the last years have shown that crops with a more complex morphology like high tomatoes, cucumber, egg plants and cannabis can deliver up to 20% higher production at the same light level when the light is deeper vertical distributed in the crop.
To achieve the optimal balance between even light spreading and deep distribution we have developed a wide score of different beam angles and beam patterns.

90 degrees antiglare
90 degrees antiglare
90 degrees batwing
90 degrees batwing
105 degrees antiglare
105 degrees antiglare
130 degrees batwing
130 degrees batwing

Upgradable LED engines for a sustainable future

Over the last years extremely big steps have been made in the efficiency of LED grow lights, what has led to an exponential increase of LED grow light application in greenhouses for a wide range of crops.

Motivations of the growers though can have wide varieties with each its specific aims

  • Saving energy compared to HPS SON-T installations is probably the most common driver today for growers to invest in LED grow lights – as of today we can replace the light level of a 1000 watt HPS SON-T lamp with just 530 watts of LED grow light energy or a saving of 47%.

  • Better temperature controls during growth – one of the main disadvantages of growing with HPS SON-T lamps in grow rooms is the extensive heat these lamps produce.
    A 1000 watt HPS SON-T generates 700 watts of heat – more specific the biggest portion of this heat goes to radiated heat which leads immediately to ambient temperature and leaf temperature increase.
    While growers aim for higher light levels, this heat can become too much for a good controlled production.
    In these cases a hybrid or full LED installation can be the way to go.
    The CoolPack® HO produces just 162 watts of heat out of a 600 watt lamp, or 55% less than a tradition 1000 watts HPS SON-T grow light.
    Take on top of that in account that we produce up to 12% more light from the same lamp and you can conclude that the total heat production goes down with 75% for the same light levels.

    In grow rooms extra heat also means extra cost for cooling and the directly related investment and energy bill, so also from that side our LED grow lights outstand in an overall much lower cost for air conditioning both on capex and opex.

  • Specific crop improvements during various growth stages.
    One of the biggest advantages of LED grow lights is the potential of steering plants with specific light spectra.
    In this way germination can be speed up, a stronger root production can be achieved or stretching of plant can be avoided.

Although the efficiency of LED grow lights highly surpasses these of traditional HPS SON-T lamps today, the end of further improvement is still far away.
Over the next years more big steps are expected in potential light production per watts of energy.
Therefore we have develop our grow lights in this way that the light engines can be individually replaced without the need to re-invest in a complete grow light installation.

Why would you upgrade your grow light LED engines over time?

  • When you would save more cost of energy than what the upgrade of the LED engines would cost over time.This is mainly the case for growers who pay high energy prices like in west and south Europe and work without a CHP, and crops which run with many lighted hours per rotation like tomatoes, cucumbers, bell peppers, cannabis,…
    Certainly in grow rooms the importance of extreme high light efficiency is an absolute point of attention, even more than in a greenhouse.
    Take as an example a cannabis flowering room, where the capex to opex rate for LED grow lighting over a 5 year period is 30/70.
    So 70% of the cost comes from the operational cost mainly as a result of electricity consumption.
    If you can move from a light efficiency of 2.3µmol/J to a light efficiency of 3.2µmol/J, that would save you 28% of electricity cost for the same light level.

  • When your crops would benefit more from the extra light you get after an upgrade than the cost of upgrade.
    Mainly light loving crops which still produce more at higher light level than the original installed light level show great profit of this.
    Take for example a cannabis flowering room installed a light level of 600µmol/sm² in 2018 at an efficiency of 2.2µmol/W.This grower could today move for the same power consumption to a light level of 850µmol/sm² with a simple upgrade and for the same power consumption.

  • When in the future other light recipes would be proven to be much more efficient.

CoolPack® LoB-holder-lens assembly steps



  • Absolute market leading
    PPF 3.520µmol/s
  • Highest photon efficiency
    3.0µmol/J - 3.5µmol/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
  • 10 years warranty
  • Best thermal management
  • Full IP67 waterproof
CoolPack® LED Top Light
Light SourceCoolGrow® I LED
PPFUp to 3.520 µmol/s
Input Power530W - 1067W spectrum depending
Efficacy3.0 µmol/J - 3.5 µmol/J
Input Voltage90-305 Vac or 249-528 Vac
Fixture DimensionsW103 x L680 x H142.09 (mm)
Weight8.000 gr
Thermal ManagementAdvanced water cooling
Dimming0 -10V, PWM, DALI, BLO Bluetooth, Synapse Wi-Fi or LAN
Light DistributionAdvanced TIR - 105˚, 130˚, 135˚/80˚ asymmetric
Lifetime75.000 hrs - L90B50
Power Factor>95%
Warranty10 years