01 — Description
Présentation du produit
Discover the Cosmorrow Growing 40W 90cm LED horticultural bar from Secret Jardin in 6500K! Thanks to this lighting, you will considerably boost the growth of your plants, while avoiding excessive heat, significant electricity consumption or even tedious bulb replacements.
Thanks to its waterproofing (IP65), you can cultivate peacefully with a certain humidity level, without any risk.
What are the main advantages of the Cosmorrow Growing 6500K?
- Improved development and rooting
- Between short knots
- Rapid and explosive growth
- A passive heatsink for less heat
- 115° angle
Weight: 0.350Kg - Size: 90cm
Warning: Requires Cosmorrow power supply to operate.
02 — Specifications
Caractéristiques détaillées
| Functions | Not Dimmable |
| Waterproof | Yes |
| Marque | Secret Jardin |
| Dimensions (cm) | 90 x 4.5 x 1.6 |
| PPF | 107 µmol/s |
| Compatibilité | Alimentation Secret Jardin (simple ou double), autres lampes horticoles (LED, CFL, HPS, CMH) |
| Tension (V) | 24 |
| Longueur (cm) | 90 |
| PPE | 2.7 µmol/J |
| PPFD moyen | 240 µmol/m²/s |
03 — Customer reviews
Customer reviews
Comments All reviews Our customer reviews
04 — Questions about this product
Product questions
Your questions about this product
- What is the electrical consumption of the Cosmorrow Growing 40W - 90cm LED bar and is it suitable for indoor use in my loft?The Cosmorrow Growing 40W - 90cm LED bar has an electrical consumption of 40 watts. Its low consumption, combined with an estimated lifespan of 50,000 hours, makes it an energy-efficient option for growing plants indoors. With a length of 90 cm and a modular system, this LED bar is perfectly suitable for indoor use, such as in your loft. It can be installed in various ways to best suit your needs. Its waterproof design and operating temperature range make it resistant to humidity, perfect for growing in a loft. This model is specially designed for the growth phase of plants, providing them with optimal lighting for their development. So, even in a loft, your plants will grow healthily. Above all, do not hesitate to consult our catalog to find all the necessary accessories to accompany your LED bar. Happy indoor farming!
- Is the Cosmorrow Growing 40W LED bar compatible with a standard power supply system or is it mandatory to use the brand's specific power supply?For the Cosmorrow Growing 40W - 90cm LED bar, it is important to use the brand Secret Jardin's specific 24V power supply. This ensures optimal compatibility and equipment safety. Using a standard power supply may cause malfunction or overheating risks.
- Is the Cosmorrow Growing 40W 90cm LED bar optimal for a SCROG installation under LED with a 6500K spectrum?The Cosmorrow Growing 40W - 90cm LED bar features a partial 6500K spectrum, suitable for vegetative growth, and offers a good light output as well as an interesting efficiency for a small area. Therefore, it can be suitable for a SCROG installation, which requires uniform and sufficient lighting.
However, this model is not exclusively optimized for a pure 6500K spectrum, which may somewhat limit its potential if you are looking for perfectly targeted lighting for the vegetative phase under LED. For a more demanding SCROG installation, it would be ideal to favor lighting specifically designed to maximize this spectrum.
In summary, this LED bar works well as support or as a complement in a SCROG, but for optimal results, a panel or bar with a dedicated 6500K spectrum would be a better option. - What is the actual light output (PPE in Watts) of this Cosmorrow Growing 40W LED bar at 6500K for vegetative growth?
The Cosmorrow Growing 40W LED bar at 6500K offers an actual light output (PPE) of around 2.7 µmol/J for vegetative growth. This means the lamp produces about 107 µmol of photons per second while consuming 40 W, ensuring efficient light well-suited for indoor plant photosynthesis.
- With this Cosmorrow Growing 40W LED bar under 6500K and this 115° angle, what is the output in terms of micro-moles per second, and is this source optimal for a SCROG in LED over a 1x1 space, especially in terms of coverage and light penetration?
The Cosmorrow Growing 40W LED bar under 6500K shows an output of approximately 101 µmol/s with a photon efficiency of 2.7 µmol/J. Its wide 115° angle favors good lateral diffusion, ideal for germination or vegetative growth.
However, for a SCROG in a 1x1 meter space, a single bar does not guarantee uniform coverage or sufficient light penetration, especially in the flowering phase. It is recommended to combine several or opt for more powerful and focused lighting to achieve homogeneous and effective lighting across the entire area.
- How does the Cosmorrow 40W LED bar perform in terms of light penetration for growing plants compared to other traditional horticultural LEDs?
The Cosmorrow 40W LED bar (90cm) provides effective light penetration for vegetative growth due to its excellent energy efficiency of 2.7 µmol/J. Its 6500K white spectrum is specifically tailored for the vegetative stage, stimulating photosynthesis and the development of leaves and stems.
Compared to traditional horticultural LEDs, it offers good light penetration and an IP65 rating ideal for humid environments. However, it does not provide a full spectrum including red and blue, which is often necessary for flowering or germination. In summary, it excels for vigorous growth in the vegetative phase, but for broader needs, other panels may be recommended.
- Does the passive heat sink of the Cosmorrow Growing 40W LED bar suffice to maintain an ideal temperature in cultivation with continuous lighting, or do you recommend additional ventilation?
The Cosmorrow Growing 40W LED bar is equipped with an efficient passive heat sink that generally suffices to maintain an ideal temperature for cultivation, especially with a single bar and in a well-ventilated space. This system limits produced heat, which is a real advantage for preserving plant health without overheating.
However, if you are using multiple bars in a confined space, or if the room is poorly ventilated, it is better to add additional ventilation to avoid heat or humidity build-up. In summary, for typical use, the passive heat sink is more than sufficient, but under more demanding conditions, additional airflow will be beneficial.
- LED bar 40W 90cm Cosmorrow Growing, real growth gain versus consumption in micro space 60x60?
The Cosmorrow Growing 40W 90 cm LED bar is particularly suitable for a micro space of 60x60 cm. Its power of 40W combined with a PPF flux of 107 µmol/s ensures excellent light density (high PPFD) over this area, promoting quick and even plant growth.
Its luminous efficiency of 2.7 µmol/J guarantees a very good energy yield, with a very reasonable power consumption for the quality of light provided. Additionally, its low thermal output allows it to be positioned near plants without risk, thus maximizing its efficiency in a small space.
In summary, this bar represents an excellent compromise for effective cultivation on 60x60 cm, optimizing growth and electrical consumption in a controlled environment.
- What is the actual electricity consumption in kWh per month for a surface of 1.5m by 1.5m with the Cosmorrow Growing 40W 90cm LED bar in continuous use, and what is the light output in umol per joule?The Cosmorrow Growing 40W 90cm LED bar consumes about 28.8 kWh per month when running continuously (24 hours a day), regardless of the surface area, as consumption depends solely on power (40W) and usage time.
- What are the advantages and disadvantages of using the Cosmorrow Growing 40W 90cm LED bar for mixed cultivation of several varieties in the same room, particularly in terms of light uniformity and heat management?
The Cosmorrow Growing 40W - 90cm LED bar has several advantages for mixed cultivation:
- Full spectrum suitable for growth and flowering, which works well for several varieties with similar light needs.
- Good light uniformity over modest surfaces (about 90x60 cm), ensuring a stable distribution of light.
- Low heat emission, allowing the lamp to be placed close to the plants without the risk of burning, which facilitates heat management indoors.
- Long lifespan and energy efficiency, ideal for regular use across different growth phases.
However, it does have some limitations:
- For larger spaces or a large number of varieties, multiple bars will be needed to ensure uniform light, complicating overall thermal management.
- No individual adjustment of intensity or spectrum, therefore less flexible if certain varieties require very specific needs.
- The product is sold without a power supply, requiring additional purchase and installation.
In summary, this bar is an excellent choice for mixed cultures in small to medium rooms, thanks to its versatile spectrum and low heat. For larger spaces or very diversified needs, an installation with multiple well-distributed units will be necessary to optimize light and temperature.
- Is the Cosmorrow Growing 40W LED bar compatible with dimming systems to adjust brightness according to the growth phases?
The Cosmorrow Growing 40W LED bar - 90 cm, designed for growth with 6500 °K LEDs, is not compatible with dimming systems. It operates at a fixed intensity, ensuring stable and suitable light for this cultivation phase, with no possibility of gradual adjustment.
For precise control of brightness according to the different stages of growth, it is better to opt for specific solutions with dimmable LEDs or systems combining multiple separately controllable light sources.
- What are the technical details and real performance of the Cosmorrow Growing 40W 90cm LED bar in terms of lumens and PAR efficiency per watt?
The Cosmorrow Growing 40W - 90cm LED bar delivers a power of 40W at 24V, with a waterproof design ensuring lasting longevity, often around 50,000 hours. It offers a light spectrum optimized for vegetative growth, ideal for stimulating photosynthesis in plants, whether vegetables, fruits, or herbs.
However, precise data on the number of lumens produced and especially the PAR (Photosynthetically Active Radiation) efficiency per watt is not specified. This information is often missing for this type of consumer LED bar, but one can expect good energy efficiency, consistent with horticultural LED technology.
For a more in-depth measurement of light performance, you can also check our LED panels or Quantum Boards, whose PAR efficiency per watt is clearly documented and optimized for indoor cultivation.
- Is integration possible with a voice assistant system to control the power or schedule of the Cosmorrow Growing 40W 90cm LED bar?
The Cosmorrow Growing 40W - 90cm LED bar does not have a native function for direct integration with a voice assistant system to control its power or schedules.
However, it is entirely possible to use a smart module or a relay compatible with voice assistants like Alexa or Google Assistant, which you could connect upstream to manage turning it on, turning it off, and potentially scheduling.
This solution would offer you more flexibility while maintaining the quality and efficiency of your horticultural lighting.
- Is the Cosmorrow Growing 40W LED bar really effective for a complete growth cycle in hydroponics without causing overheating?
The Cosmorrow Growing 40W LED bar - 90cm is perfectly effective for a complete growth cycle in hydroponics thanks to its optimized 6500K white spectrum for this phase, high light output, and low operating heat. You can position it very close to the plants without risking overheating or thermal stress.
However, this bar does not cover the red and blue spectra necessary for flowering. For a complete cycle including flowering, you will need to supplement with other suitable light sources, as it alone will not be sufficient.
In summary, it is ideal for robust and healthy growth in hydroponics, without generating overheating, but incomplete for successful flowering.
- What is the exact monthly consumption in kWh of the Cosmorrow Growing 40W 90cm LED bar, and what is its light output in µmol per joule for a growing space of 1.5m by 1.5m with the optimal height of suspension?
The LED bar Cosmorrow Growing 40W – 90 cm consumes approximately 21.6 kWh per month if it operates 18 hours a day (40 W × 18 h × 30 days).
Its light output is about 1.8 µmol/J, which means it produces 1.8 micromoles of photosynthetic photons per joule consumed. With a PPF of 88 µmol/s, it effectively illuminates a relatively small space of about 1 m × 0.4 m.
For a growing space of 1.5 m × 1.5 m, it would be necessary to install multiple bars to ensure optimal coverage and good overall output.
Finally, the recommended suspension height is between 15 and 35 cm above the foliage, promoting uniform and effective lighting depending on the growth phase.
- Can the Cosmorrow Growing 40W LED bar be easily integrated into an automated setup with humidity and temperature sensors to manage the lighting based on cultivation conditions?
The Cosmorrow Growing 40W LED bar operates at 24V with a specific power supply and offers 6500K white light, ideal for vegetative growth. It is compatible with simple automation via an On/Off system controlled by humidity and temperature sensors, thanks to its IP65 rating which makes it resistant to moisture.
However, this bar is not dimmable, fine modulation of light intensity is therefore not possible without additional equipment. It can only be turned on or off automatically, which often meets the basic needs for lighting management.
Finally, to ensure safety and performance, it is imperative to use the appropriate Cosmorrow 24V power supply and to provide a relay or contactor for automatic control.
- Is the Cosmorrow Growing 40W LED bar in 6500K suitable for a hydroponic system in the growth cycle only, or can it also be used in flowering with a different spectrum?
The Cosmorrow Growing 40W LED bar in 6500K is perfectly suited for the growth (vegetative) phase in a hydroponic system, promoting dense and rapid plant development thanks to its specific spectrum. However, it is not designed for flowering.
For the flowering cycle, it is recommended to use an LED bar with an appropriate spectrum, such as those dedicated to this phase in the Cosmorrow range. You can either replace the 6500K bar or combine it with a flowering bar to provide a complete spectrum and optimize your plants' production.
This approach with targeted spectrums allows for precise responses to the light needs of plants at each stage of their development.
- What are the concrete advantages of the Cosmorrow Growing 40W 90cm LED diffuser in terms of thermal and economic management during growth compared to conventional horticultural lighting?
The LED diffuser Cosmorrow Growing 40W – 90 cm stands out with an efficient thermal management thanks to its completely silent passive cooling system, which limits overheating and noise. This low heat emission protects your plants from thermal stress, unlike conventional lighting such as HPS or CFL.
Economically, its low consumption of 40W significantly reduces the electricity bill. Its long lifespan of around 50,000 hours decreases maintenance costs, and its targeted light spectrum around 6500K optimizes plant growth and health for better yield.
In summary, this diffuser offers efficient, durable, and economical lighting, ideal for healthy and profitable indoor cultivation during the growth phase.
- Compatible with standard home automation system to adjust intensity and schedule remotely?
The Cosmorrow Growing 40W LED bar - 90cm is not dimmable, so it does not allow for adjusting light intensity remotely. It is only compatible with simple on/off automation via humidity or temperature sensors, thanks to its IP65 waterproofing. However, it requires a dedicated Cosmorrow power supply and does not support standard home automation systems (Wi-Fi, Zigbee, Z-Wave) to adjust schedules or intensity remotely. This model is suitable for basic management but not for complete home automation control.
- What is the compatibility of the Cosmorrow Growing 40W 90cm LED bar with hydroponic systems in terms of installation and light efficiency?
The Cosmorrow Growing 40W 90 cm LED bar is perfectly suited for hydroponic systems, both in terms of installation and light efficiency. Its IP65 rating ensures water and dust resistance, ideal for the humid environments of hydroponics. Compact and with low heat emission, it can be placed very close to the plants safely, thus optimizing lighting in often restricted spaces.
In terms of light, its spectrum combines a high proportion of red and blue light, promoting photosynthesis and vegetative growth. With a PPE of 2.7 µmol/J and a light density of about 240 µmol/m²/s at 20 cm, it offers performance suitable for young plants or microgreens in hydroponic cultivation. Powered by 24V via a waterproof connector, it integrates easily into modular systems.
In summary, this LED bar combines robustness, ease of installation, and optimized light efficiency for hydroponic growth.
- Is it possible to use multiple Cosmorrow Growing 40W LED bars in parallel with a single Cosmorrow power supply to optimize the cultivation of two different spaces without risks of overheating or underpowering?
Yes, it is entirely possible to use multiple Cosmorrow Growing 40W LED bars in parallel with a single Cosmorrow power supply, provided that it is a dual output 2x40W power supply designed to support this configuration. This type of power supply provides stable and appropriate power, thus avoiding any risk of underpowering or overheating.
The Cosmorrow bars benefit from efficient passive heat dissipation, which, combined with good ventilation, allows for prolonged use without heat issues. This solution is ideal for easily and effectively managing two distinct cultivation areas while optimizing LED performance.
- What are the actually observable advantages in terms of growth and yield when comparing the Cosmorrow Growing 40W 90cm 6500K LED bar to traditional horticultural lighting in a mixed crop with several varieties in the same room?
The Cosmorrow Growing 40W 90cm 6500K LED bar is designed to optimize the vegetative phase, especially for mixed indoor crops. Its cold light spectrum stimulates a strong rooting and fast growth with short internodes, key criteria for harmonious development of different varieties in the same space.
Compared to traditional horticultural lighting (HPS, CFL), it provides a better light yield with only 40W consumed, enabling effective photosynthetic input while limiting electricity consumption.
Its design generates much less heat, reducing thermal stress on the plants and facilitating temperature management in multi-variety cultivation.
With a homogeneous diffusion over 90 cm, the bar ensures even lighting, essential for setups like SCROG where light needs to be well-distributed.
In summary, the Cosmorrow bar significantly improves growth speed, root health, and energy efficiency, while limiting heat, which is a real advantage in mixed indoor cultivation on a reduced area.
- What is the luminous power in lumens and the luminous efficacy per watt of this Cosmorrow Growing 40W LED bar to actually optimize growth while limiting heat emission?
The Cosmorrow Growing 40W – 90 cm LED bar consumes 40W with a stable 24V supply, ensuring low heat emission.
The lumen output is not specified as this type of lamp prioritizes the spectrum useful to photosynthesis over visible brightness.
In terms of efficiency, the luminous efficacy for growth (PPF efficiency) is around 1.9 μmol/s/W on a similar model, which means an excellent ratio of useful photons per watt consumed. This efficiency promotes optimal growth while limiting heating in compact spaces.
The spectrum is specially calibrated for vegetation, ensuring healthy development without the need for dimming.
- What is the PPFD curve measured at 20cm below the Cosmorrow Growing 40W 6500K LED bar and what is its efficiency in g per watt under these conditions?
The Cosmorrow Growing 40W 6500K LED bar delivers an average of 240 µmol/m²/s of PPFD measured at 20 cm below the light, over a recommended area of 90 x 60 cm. Its light efficiency (PPE) is between 2.7 and 2.85 µmol/J, with a total photon flux (PPF) of about 107 µmol/s for 40 W consumed.
Regarding the yield in grams per watt, there is no specific data for this bar, but under typical indoor growing conditions with this level of PPFD, one can estimate a yield of about 0.5 to 1 g/W, depending on the cultivated varieties and cultural practices.
- Does the Cosmorrow Growing 40W 6500K LED bar work with any power supply or does it absolutely require the specific Cosmorrow power supply indicated?
The Cosmorrow Growing 40W 6500K LED bar must be powered by the specified Cosmorrow specific power supply. This power supply is designed to ensure a stable voltage of 24V DC, a suitable power of 40W, and optimal heat dissipation, thus guaranteeing a reliable and long-lasting operation of the lamp.
Using another power supply could lead to overheating issues, electrical instability, or even reduce the performance and lifespan of the LEDs. Therefore, for effective and smooth indoor cultivation, it is essential to opt for the dedicated Cosmorrow power supply.
- What is the significance of the 115-degree angle of diffusion on light coverage when growing in dense environments with multiple varieties?
The 115° angle of diffusion of the LED bar Cosmorrow Growing 40W - 90 cm allows for effective illumination of a large area, which is valuable in dense environments with multiple varieties. This wide diffusion ensures uniform coverage, avoiding shadow areas and ensuring that every plant, regardless of its height or type, receives enough light for balanced growth.
In addition, this extended diffusion combined with low consumption limits thermal stress, making it ideal for a multi-species vegetative environment. This results in uniform light distribution over the 90 cm surface, essential for good penetration into the foliage and various layers of the canopy.
However, it is advised that in very dense cultivation, multiple bars should be combined to ensure effective lighting depth while maintaining this excellent lateral uniformity.
- Is the Cosmorrow 40W 90cm LED bar compatible with a standard power supply?
The Cosmorrow Growing 40W - 90cm LED bar operates on 24V DC and requires a specific Cosmorrow power supply to function. It is not compatible with a standard 220-240V AC power supply without an appropriate transformer. To ensure its safety and proper operation, it is imperative to use the dedicated Cosmorrow driver, sold separately.
- Compatible with Cosmorrow power supply, does this LED bar allow control via a home automation interface to automate light cycles and optimize growth?
The Cosmorrow Growing 40W LED Bar - 90cm is perfectly compatible with the Cosmorrow 24V power supply, ensuring stable lighting suited to your growing needs.
However, it does not have an integrated home automation interface nor Wi-Fi or Bluetooth connectivity. To automate light cycles, it is necessary to use an external smart plug or module connected upstream of the power supply. This allows you to program the turning on and off via an app or voice command, thus optimizing the growth of your plants through precise and automated control.
This solution offers great flexibility while maintaining the horticultural quality of the lighting.
- What specific power supply do you recommend to optimize the stability and power of the Cosmorrow Growing 40W 90cm LED bar in intensive cultivation with a high humidity rate?
To ensure optimal performance and perfect stability of the Cosmorrow Growing 40W 90cm LED bar in intensive cultivation with high humidity, we strongly recommend using the 24V 1.67A specific power supply developed for this bar. This power supply ensures a stable voltage of 24V DC and a current of 1.67A, essential for a constant power of 40W.
It is designed to provide excellent thermal dissipation, which is crucial in a humid and demanding environment, helping to preserve the lifespan and performance of the LEDs. Using an unsuitable power supply could lead to fluctuations, instability risks, and premature wear.
To match this power supply, you will find on our website the solution specifically sized that perfectly accompanies this LED bar.
