LEDs definitely also produce heat, but the major differentiator compared to other lighting technologiescomes from the type and the amount of heat which is generated.An HPS SON-T lamp of the latest generation has an efficacy around 40%. Which means that a 1000 watts HPS SON-T produces 40% of light and 60% of heat or 600 watts of heat.Since a HPS SON-T lamp becomes extremely hot, the majority of this heat loss (90%) goes to radiated heat or IR radiation. As a result, this technology doesn’t allow the lamps to hang too close to the crops, which would lead to tip burn and damage of the stomata.At higher light levels, the excess radiation and general heat loss leads to bigger challenges concerning climate control.

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Of course the potential of the CoolGrow® Linear goes much beyond these, in case you have specific cultivation requests, let us know and our plant lighting experts will be happy to advise you.

Soft diffusion materials are quiet when used outdoors in windy conditions. They can also be heat-welded to produce large panels for overhead tenting and large area diffusion. However, these materials are only moderately heat resistant and should not be used directly on high temperature lights.

TOUGH WHITE DIFFUSION A general purpose group that offers medium to dense diffusion properties. Wide beam spread creates an even field of soft, shadowless light that is quite pleasing.

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As we still want to use the heat loss in the most optimal way, we have designed the CoolGrow® Linear in such way that the chassis of the lamp will stabilize at 40°C at an ambient temperature of 23°C.In this way, we have created an artificial grow tube where the energy loss is used in a positive way.

Tough White Diffusion and Grid Cloth are heavy diffusers. Both create near shadowless light when used in large frames away from light. Multiple light sources can be made to appear as one. For example, these diffusers can take five 1,000W lamps grouped together, and the expected multiple shadows will not appear.

The spectral composition of the different wavelength regions (blue, green, yellow, red, far red or invisible e.g. UV or IR) is important for the growth, shape, development and flowering (photomorphogenesis) of the plant.

To demonstrate the importance of light and spectrum efficacy, a similar system with a light efficiency of 2.3 μmol/J would have a major impact on both capex and opex.To reach a light level of 280μmol/sm² you would need 40% more lamps and capital, while the energy cost would raise with the same 40% overall.

Diffusion possibilities are endless. Their use should be based on your own likes and dislikes. Be bold. Experiment. Create. It is important to remember that diffusion is designed to enhance the quality of the light; it is not a cure-all for a badly placed light.

GRID CLOTH A group of reinforced woven materials that offer medium to very dense diffusion properties. Very wide beam spread creates a very soft shadowless quality. Ideal for tenting, overheads, and large area diffusion. Can be sewn or grommetted to fit butterfly and overhead frames.

TOUGH FROST A general purpose group that offers slight to medium diffusion properties. Moderate beam spread, yet still maintains a discernible beam center.

Among them, the phytomorphogenic effects are controlled by applying a spectrum with a certain mix of 660nm and 730nm can be stimulated the Pr (red) and Pfr (far red) phytochromes which are influencing germination, plant growth, leaf building and flowering.

When light from a point source shines on a three dimensional object, shadows are created. Of course, these shadows are the areas where the light does not fall. In nature, the sun on a bright cloudless day is a good example of light from a single point source.

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A specific spectrum is not only important for specific growth results.It also allows you to work at an absolute maximal light efficiency, which at the end determines more that 50% of you annual costs to grow in a vertical farm.

With the CoolGrow® Linear everything becomes just that little more effective, which makes the difference in the end.By positioning the LED grow light bars as close as possible to the crops, all the produced light is steered towards the crop in the most effective way.

Light level PPFD 435μmol/sm².Light spectrum high blue broad spectrum – concentration on root development – short vegetative cycle with compact plants.8 lamps CoolGrow® Linear per layer – 60 watts per lamps – 15 watt per square footPhotoperiod 18 hours – DLI 27 mols/day.The lamps can either be placed with 8 bars in parallel next to each other, or in 4 rows of 2 lamps in the length.By use of the CoolGrow® Linear 100 watts the rows can be reduced to 3 lines.

Therefore, that's why we have developed a wide score of grow light spectra, each with its specific purpose and with an absolute balance between targeted plant growth and optimal light efficacy.

CFLs or fluorescence lamps (often in the format of a linear TL) are frequently used for micropropagnationand for crops with limited light needs, but have a very low efficiency of only 20%, which means that just 20%of the energy goes to light and 80% goes to heat.

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In this example our setup runs 280 days per year at photoperiod of 16 hours per day, 4480 hours per year, so good for a daily light dose DLI of 16.13mol/d.The total annual power consumption is 12.9MW.The investment cost with a depreciation on 7 years would come around 1250USD per year while the energy cost calculated at 77USD per MW would result in 993USD per year.As a result the total cost per square foot is 5.84USD during the depreciation period, and drop down to 2.59USD after the depreciation.The major reason of the moderate operation cost comes from the high efficacy of the CoolGrow® Linear LED grow light, with an efficiency of 3.5 μmol/J with this spectrum for leafy greens.

Faces love these materials-especially when Tough White Diffusion is placed close to the lamp and when Grid Cloth is mounted far away. Don't believe me, ask the doll in the tests.

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Large diffusion panels can turn multiple lighting fixtures into a single source of soft, low contrast illumination. As overheads, diffusion can be placed above sets to deliver a soft, overcast look or used outdoors to diffuse harsh sunlight. Sets can even be "tented or completely surrounded with diffusion to produce an extremely soft, shadowless quality that is particularly useful for product photography of specular objects like glassware, jewelry and automobiles.

The light intensity and photoperiod needs to be adapted to the growth phase and increasingly be augmented towards the end of the egetative phase.To enable this, the CoolGrow® Linear can be equipped with the CoolControls® digital BLE controls. Both, the light intensity and the photoperiod can be set in a calendar scheme running on a cloud application, without extra cabling on the lamps.

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2 layer plant factory setup with per layer a cultivation area of 8 feet by 4 feet = 32 square feet, 64 square feet in total.

“A linear LED grow light bar full of surprises” this is how you best describe the CoolGrow® Linear.Besides a market leading light efficiency, this vertical farming grow light platform is foreseen from a bunch of sophisticated features and options what makes implementation in your farm so much more practical.

Intensive research and development, in collaboration with industry leaders in cultivation systems, has resulted in a wide range of available beam patterns.

In the same grow rack setup Both in the rooting and vegetative stages, the crops need a relatively high dose of blue photons in the light spectrum. We always focus on the potential of controllable light spectra in greenhouses, and and the advantage of our LED grow lights are dimmable and controllable by the climate computer. Besides focusing insights into what plants need spectrum wise in each growth phase, dynamic lighting, where the light spectrum is changed during the day, has been proven to be highly beneficial to improve the morphology of the plant and to generate a higher yield for many crops.

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This same basic principle applies to most of the lighting equipment used in film and video production. The reflectors in such fixtures gather the light into a point source and then focus it, usually through a lens. The resulting beam of light is directional, offering a high level of intensity or "punchy but it can also present a number of drawbacks:

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Light level PPFD 900μmol/sm².Light spectrum broad generative – concentration on flowering and homogeneous crop development.16 CoolGrow® Linear LED grow lamps of 60 watts per layer, either parallel next to each other or in 8 rows over the length daisy-chained or 5 rows of 100 watts.60 watts per lamp – 30 watts per square foot.Photoperiod 12 hours – DLI 39 mols/day.The light intensity and photoperiod can easily be controlled either by a simple dimmer (0-10 volt or PWM) or by the CoolControls® BLE digital controls option. The CoolControls® offers calendar control, so the cultivation can be planned in up front.

Rosco diffusion material acts in a similar fashion. When placed in the beam path of a lighting fixture, diffusion material modifies the harsh quality of the light by spreading or dispersing the beam. This softens the quality of the illumination by increasing the apparent beam size and thereby altering the beam's "shadow casting properties".

A typical plant factory grow light setup for butterhead lettuce with high light level PPFD 280μmol/sm².A plant factory setup with 12 grow units of 8 by 4 feet each (32 square feet per unit, 384 square feet total) needs a total of 48pcs of CoolGrow® Linear lamps, on each shelve placed in a linear setup with 2 rows. Each lamp consumes 60 watts so the total hourly power consumption is 2.88kWh.

TOUGH SILK A unique diffuser with directional properties. Spreads the beam in one direction-horizontally, vertically or diagonally-to create a slash of light. Also useful for spreading out an unwanted beam scallop caused by tight spaces and extreme lighting angles. Good transmission.

Crop-specific light beams lead to major improvements in specific cultivation systems. As an example, thewide batwing beam placed over a gutter of strawberries immediately leads to a more homogeneous photonspread over the leaves resulting in a higher net photosynthesis and a notable increase of brix level in theberries.

Diffusion material can be placed at the source in a gel holder, clipped to barn doors or positioned in front of a fixture in a frame. Each position produces a slightly different effect.

Also, the generated heat, although less prominent than in other grow light technologies, will thus make a positive contribution to the stomatal opening and plant activation.The light intensity on the plant canopy can be determined by the distance to the crop, the number of light bars on the surface as well as by light output controls on the lamps themselves.

On an overcast day, water vapor in the cloud cover alters the harsh directional quality of sunlight by causing it to be spread out or dispersed. The resulting light seems to be coming from the entire sky, producing an illumination that is softly diffuse. Shadows are faint or undefined. Contrast is lowered.

The limited heat generation of LED grow lights fits perfectly with the cultivation of colder cultivars likemicrogreens and leafy greens, but also creates major climate advantages for high level lighted crops likemedicinal cannabis.

Radiated heat does not only have disadvantages – the long wavelength of the IR radiated heat facilitates thepenetration into the canopy, which on many cultivars leads to extra activation and stomatal opening. Theradiated heat also raises the leaf and plant temperature when it penetrates the tissue.When transitioning from HPS SON-T lamps to LED technology, adjustments to climate settings and lightstrategies are essential for achieving optimal results.

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The following diffusion groups are designated "Tough". This indicates that the base material is a heat stable polyester that can be used with most high-temperature lighting fixtures.

This makes LED grow lights ideal for plant factories and vertical farms, where the lights are placed close to the crops to obtain optimal use of the available height of the room.

The impact of light efficiency is in many times seriously underestimated.See the year-round production with continuous lighting, the efficacy of the grow lights is even more important than in a greenhouse.

A LED grow light has an average efficacy of 70% and the other 30% goes to heat.Thermal design to obtain a low temperature is an absolute must in LED grow lights, this ensures a longer lifetime. The heat goes mainly to free air convection, so heat that goes up in the air.

The most important difference between atmospheric diffusion and Rosco's version is that the Rosco diffusion materials can be utilized to produce controllable and predictable results at any time.

The timing / light duration which is called the photoperiod, is mainly affecting the flowering of the plants. The flowering time can be influenced by controlling the photoperiod.