Présentation du produit
Move up a gear with this new generation LED horticultural lighting!
Welcome to the future of indoor growing with the SpectraWILD M420 , a remarkable technological breakthrough that delivers powerful 420-watt LED lighting to create the ideal growing environment for your plants . With a rugged yet discreet design, easy installation, and exceptional lighting performance , the M420 is the ultimate choice for serious indoor growers looking to transform their crops.

Why does the GrowLED team recommend this lighting?
- High-performance lighting with Samsung LEDs
- Growth and flowering spectrum with integrated dimmer
- The incredible management console (sold separately) that allows you to control the lighting with a smartphone (without subscription)
- Perfect system for 120cm x 60cm or 150cm x 90cm
- Possibility to connect several lights
- Totally silent
Replace your 600W HPS with this new LED horticultural lighting
The SpectraWILD M420 combines robustness and durability with a sophisticated design, created specifically to meet the demands of indoor growers . Its durable and waterproof housing ensures long-term flawless performance, even in the most demanding indoor environments with high humidity or variable temperatures . Its sleek and compact design will fit perfectly into your growing space, whether it is a grow box, greenhouse or dedicated room, adding a touch of modernity without compromising the space needed for the optimal growth of your plants. With the SpectraWILD M420, you benefit from high-quality LED lighting that is not only an indispensable tool for your cultivation, but also an aesthetic enhancement of your growing space.
The SpectraWILD M420 in detail
The SpectraWILD M420 incorporates the latest LED lighting technologies to deliver unmatched performance. Equipped with high-quality Samsung LEDs, it guarantees an exceptional luminous efficacy of 2.7μmol/J , which means that your plants will receive the maximum amount of light useful for their growth, while minimizing energy consumption. At full power, the M420 consumes only 420 watts , or around €17 of electricity per month , making it an ecological and economical choice.
Optimal Light Spectrum for Indoor Growing
The SpectraWILD M420's light spectrum has been meticulously studied to best meet the needs of your plants at every stage of their development. It consists of 2800K LEDs (199pcs x8bar ), 660nm (24pcs x8bar ), and 460nm (5pcs x8bar) .
2800K LEDs promote the flowering phase of your plants thanks to their warm light spectrum that resembles sunlight at the end of the day. These LEDs encourage the production of chlorophyll, thus stimulating photosynthesis and the growth of your plants.
660nm LEDs produce an intense red light that encourages flowering and fruiting . They are essential for optimizing the yield of your crops.
Finally, 460nm LEDs, or blue light, are ideal for the vegetative growth phase. They promote photosynthesis and encourage nutrient uptake , leading to healthier, more robust plants.
The SpectraWILD M420's light spectrum has been finely tuned to ensure a perfect blend of red, blue and white light, providing the optimal light conditions for every stage of plant growth, from germination to flowering. This adaptive lighting promotes healthy growth, generous flowering and abundant yields .

Not to mention, the incredible management console!

The SpectraWILD M420 features an intuitive interface for easy control of light intensity. By pairing the M420 with the separately sold SmartWILD management console, you can program custom lighting routines, remotely control your lighting, manage on/off, temperature and humidity, and even receive notifications when your plants need extra care. With the free Tuya app, you can control your lighting from the palm of your hand , no matter where you are. The system also allows you to create a sunrise/sunset, making your gardening even more natural and dynamic. Managing your garden has never been easier or more efficient.
Management Console Functions:
- Timing management
- Light intensity management
- Sunrise/sunset function
- Overheat protection with intensity reduction if necessary
- x2 Temperature probe for two growing spaces
- x2 Humidity probe for two growing spaces
- Management of 2 groups
- Displaying the temperature and humidity of these growing spaces
- Manage all this from your smartphone via WIFI
Technical characteristics:
- Power: 420 watts
- Coverage area: from 120x60cm to 150x90cm
- Spectrum: Full Spectrum germination, cuttings, growth and flowering
- Lifespan: >50,000 hours
- Remote control: Yes (via management console and Tuya app)
- Waterproof: Yes
- Dimensions: Please refer to the product dimension guide

Package Contents:
- 1x SpectraWILD M420
- 1x Power cord
- 1x Suspension Kit
- 1x User Manual
Guarantee:
The SpectraWILD M420 comes with a comprehensive 3-year warranty. Our dedicated after-sales service team is always on hand to assist you should you need it, ensuring you have unrivalled peace of mind.
SpectraWILD M420 Growing Guide:

Germination : Set the light intensity to 20-30% and place the lamp at a distance of 60-80cm from the plants.
Vegetative growth : Increase light intensity to 40-60% and move the lamp closer to 40-60cm.
Flowering : Set the light intensity to 80-100% and place the lamp 30-40cm from the plants to encourage exuberant flowering.
Questions about this LED horticultural lighting
Question 1: What grow room should I use with this lighting?
The SpectraWILD M420 is ideally designed to illuminate an area of 120x60cm to 150x90cm, making it the perfect choice for the DarkStreet or GMAX WIDE grow boxes. If you are looking for a high-end grow room, then the Homebox R120 or Homebox R150 would also be a great choice.
Question 2: Which extractor should I use with this lighting?
Considering the energy efficiency of the SpectraWILD M420 and the amount of heat it releases, an extractor fan with a capacity of around 400/500m3h would be ideal to maintain an optimal growing environment for your plants.
Question 3: Is it possible to get a complete pack with this product?
Yes, absolutely. Our team of experts is at your disposal to help you put together a complete package that will perfectly meet your indoor growing needs. Do not hesitate to contact us for more information.
Question 4: I am a professional, how do I get a quote for a complete installation?
For professionals interested in a complete installation, we have a dedicated team ready to assist you. You can contact us by phone to get a personalized quote. We look forward to working with you to realize your large-scale indoor growing project.
Noticed:
Please read and understand the user manual before installing or using the SpectraWILD M420. For any questions or assistance, please feel free to contact our customer service.
HIGH INTENSITY LED LIGHT
• Do not look directly at the light when it is on.
• Wear appropriate eye protection when the light is in operation.
• Prevent objects from coming into contact with the surface of the light.
• The lamp does not contain UV and cannot be used in any UV environment.
• WARNING - POSSIBLE RISK OF INJURY TO EYE AND SKIN
Hazardous optical radiation may be emitted from the light source. Do not look
directly the lamp in operation. May be harmful to the eyes.
• OPERATION OF THE LIGHT: Do not use the light in an environment
UV/sunlight or near a glass object.
Caractéristiques détaillées
| Coverage area | 100 x 100cm |
| Functions | Dimmer and Console Compatibility |
| Waterproof | Yes |
| Thermal management | Passive - Completely silent |
| Power | Between 400W and 500W |
| Spectrum | Full Spectrum - Grow and Bloom |
| Manufacturer's Warranty | 3 years |
Customer reviews
Comments All reviews
Pas galère à monter, elle dégage une lumière qui tape bien sans trop chauffer. Bon investissement pck ça tourne éco et ça fait le taf easy.
J'utilise ce modèle depuis un moment, et l'ajustement de l'intensité selon les besoins est vraiment pratique. Le design est simple mais efficace, et le montage n'a posé aucun problème. Je reste fidèle à cette lampe !
Franchement bluffé par ce
Franchement bluffé par ce produit. Après une semaine d'utilisation, j'ai remarqué une vraie différence. C'est efficace, économique et facile à utiliser. Livraison rapide et bien emballée. Le service client est top. Je recommande vivement à tous ceux qui cherchent une solution fiable et durable.
Product questions
Your questions about this product
- Ok, so I understood that the SpectraWILD M420 system looks ultra efficient, but it's a bit expensive for me... Do you think I can find a similar but more affordable system? And also, what is the basic difference between a Samsung LED and another brand?I fully understand your situation. The SpectraWILD M420 is an effective system but it can bump up the budget. Several more affordable options exist, like the SpectraBULB X30 for small surfaces, or the SpectraPANEL X160 or the SpectraMODULE Z200 for medium surfaces. As for Samsung LEDs, they stand out for their superior luminous efficiency, durability, quality of their light spectrum and their excellent heat dissipation. Therefore, it is evident that their use contributes to the higher price of certain products. I hope this information will help you make your choice. Don't hesitate if you have more questions!
- What is the light yield in µmol/J of the SpectraWILD M420 at 100% and how does this compare to other 420W horticultural LED lights on the market to maximize g/W?The light yield of the SpectraWILD M420 at 100% is approximately 2.7 to 2.85 µmol/J, which is excellent for a 420W horticultural LED light. This efficiency means that the lamp provides up to 2.85 micromoles of PAR photons per joule consumed, thus optimizing plant growth while managing electricity consumption.Compared to other 420W models on the market, the SpectraWILD M420 clearly positions itself in the high-end segment, with most standard lights often showing yields below 2.5 µmol/J. Its Samsung full-spectrum LED technology, combined with infrared LEDs, ensures a full and effective light spectrum, ideal for maximizing the µmol/W ratio.Finally, its smart home compatibility allows for precise intensity control, enhancing its energy efficiency and flexibility in indoor cultivation.
- What is the maximum temperature that this lamp can withstand without reducing its intensity to avoid overheating?
The SpectraWILD M420 does not specify a fixed maximum temperature that should not be exceeded before reducing its intensity. However, it features an intelligent thermal management system with temperature probes that automatically adjust the power to prevent overheating. This device ensures stable and safe performance, even in hot or humid environments, by reducing intensity if necessary.
- What is the optimal distance between the SpectraWILD M420 and the plants to avoid overheating while ensuring good light penetration during flowering?For the SpectraWILD M420, the optimal distance during flowering is 30 to 40 cm between the LED panel and the plants. This distance helps prevent overheating while ensuring excellent light penetration. The intensity should ideally be set between 80 and 100% to maximize flower development without thermal stress.
- What is the actual average electrical consumption of the SpectraWILD M420 under normal usage conditions with dimmer and console activated?The actual average electrical consumption of the SpectraWILD M420 in normal use with the dimmer and the home automation console activated generally ranges between 300 W and 420 W. This system allows for precise modulation of power according to needs; for instance, at 80% of the dimmer, the consumption drops to about 336 W. In practice, a consumption around 400 W is often observed, adjustable according to growth or flowering phases.
- With a consumption of only 420 watts for an area of 120x60cm to 150x90cm, what is the recommended self-consumption to limit heating in a dense SCROG under LED with the SpectraWILD M420?
For a dense SCROG under the SpectraWILD M420, it is advisable to modulate the self-consumption between 300W and 420W to limit heat. Operating between 70 and 90% of the maximum power allows for controlling the temperature and VPD while ensuring intense lighting. During the growth phase, aim for 60-80% of the power, then gradually increase during flowering, always monitoring temperature and humidity. Efficient ventilation is essential, especially if you add supplementary LED modules, limited to one or two maximum to avoid overheating.
- What difference in growth or yield can I expect when using the SpectraWILD M420 compared to a standard 600W HPS for indoor cultivation?
The SpectraWILD M420 offers significantly higher light efficiency than a standard 600W HPS lamp, with 2.7 to 2.85 µmol/J compared to about 1.5 to 1.7 µmol/J for the HPS. This results in better conversion of electrical energy into useful light for plant growth.
In practice, you can expect a similar or even higher yield while consuming about 30% less energy (420W vs 600W). The full spectrum, including infrared LEDs, optimizes growth and blooming much better than HPS, whose light is less suitable.
Moreover, the reduction of heat emission allows for a more stable growing environment, limiting thermal stress and promoting plant health, which can also improve overall yield.
- How does the SmartWILD console integrate the parallel management of temperature and humidity for two different spaces on the same installation?
The SmartWILD console independently manages two growing spaces through integrated probes measuring temperature and humidity in each zone. It automatically adjusts light intensity to maintain optimal conditions, reducing power in case of overheating and can turn off the lighting if necessary.
Compatible with home automation via WiFi, it allows centralized and remote control, including synchronization of light cycles, while offering a touch interface and a smartphone app for real-time custom adjustment. This dual management ensures a perfectly adapted environment for each growing space.
- What is the maximum size difference of the cultivation area between 120x60 cm and 150x90 cm with a single SpectraWILD M420? Can you use this lamp for parallel cultivation in two distinct spaces with the SmartWILD console, or do you always need a system for each cultivation space?
The SpectraWILD M420 effectively covers a cultivation area ranging from 120x60 cm to 150x90 cm, providing great flexibility according to your needs. For parallel cultivation in two distinct spaces, it is advisable to install a system for each space to ensure optimal light coverage and avoid intensity loss.
The SmartWILD console allows you to manage multiple systems simultaneously, facilitating the centralized control of your lamps and parameters via the Tuya app. However, a single SpectraWILD M420 cannot efficiently illuminate two separate areas at the same time, so you need to plan for one lamp per cultivation space for maximum output.
- What is the precise power consumption at full power and how is heat management ensured without an external fan required for optimal performance on 150x90cm?
The SpectraWILD M420 consumes exactly 420 watts at full power, although in practice, the consumption is often modulated between 300 and 420 W depending on the growth phase thanks to a dimmer, for more efficient use.
Regarding heat management, this horticultural panel features a robust and waterproof design that facilitates thermal dissipation, even without an external fan being necessary. On a surface of 150 x 90 cm, it is recommended to place the panel at a distance of 30 to 40 cm from the plants and to maintain a power between 70 and 90% to avoid any thermal stress while optimizing light penetration.
This integrated modulation system ensures optimal performance without requiring additional ventilation, unless you add other LED modules in the growing space.
- What is the actual noise level during operation of the SpectraWILD M420 in a compact space of 120x60 cm?
The SpectraWILD M420 is equipped with high-quality Samsung LEDs designed for passive heat dissipation, meaning it operates without a fan. Therefore, its noise level during operation is very low, almost inaudible, even in a compact space of 120x60 cm.
In practice, you should not perceive any significant noise from this lighting system, ensuring a quiet and comfortable growing environment.
- What is the maximum temperature this lighting can withstand before automatic dimming occurs to prevent overheating and affect plant yield?
The SpectraWILD M420 integrates an intelligent thermal management system that automatically reduces light intensity in case of overheating to protect the plants and extend the equipment's lifespan. However, the exact temperature that triggers this reduction is not precisely indicated in the available documentation. This device ensures optimal regulation without risking affecting yield.
- What are the average PPFD readings measured at 30cm with the SpectraWILD M420 at 100% power for a surface of 120x60cm, and are there significant differences in the g/Watt ratio compared to a standard 600W HPS?
Regarding the average PPFD readings at 30cm for the SpectraWILD M420 at maximum power over a surface of 120x60cm, no precise official data is available. Based on its stated efficiency of approximately 2.85 µmol/J, a theoretical average PPFD can be estimated to be between 800 and 1200 µmol/m²/s, but this value is indicative and varies based on the arrangement of the LED bars and the uniformity of the light output.
As for the yield in g/Watt, the SpectraWILD M420 significantly surpasses a standard 600W HPS lamp. While the HPS typically offers between 0.7 and 1.1 g/Watt, the SpectraWILD can reach and exceed 1.2 g/Watt due to its high photon efficiency and better energy management, ensuring optimized growth with lower consumption.
- How to synchronize and manage two SpectraWILD M420 simultaneously with the SmartWILD console to optimize the lighting of two distinct growing spaces?
To synchronize and manage two SpectraWILD M420 with the SmartWILD console, simply connect the console to a stable 2.4 GHz Wi-Fi network. The console will enable you to control the two units independently, with distinct programming tailored to each growing space.
You can set custom lighting cycles for each SpectraWILD M420 (intensity, duration, growth/flowering phases), while benefiting from precise control through 0-10V and PWM protocols. This centralized management simplifies remote adjustments, optimizes light according to the specific needs of the plants, and limits heat by adjusting the intensity between the recommended 300W and 420W.
In summary, the SmartWILD console offers a flexible and efficient solution to manage two distinct growing spaces with ease, providing fine control and smooth synchronization via Wi-Fi.
- What practical difference will I see in terms of yield and quality between the SpectraWILD M420 and a 600W HPS lamp in a hydroponic system?
The SpectraWILD M420 offers a significantly higher light efficiency than a 600W HPS lamp, with about 2.7 to 2.85 µmol/J compared to 1.5 to 1.7 µmol/J for the HPS. Despite its lower electrical power (420W vs 600W), it delivers comparable, if not better, useful light while consuming less energy.
The full spectrum of Samsung LEDs, including infrared, optimizes growth and flowering, much more suited than an HPS spectrum often limited to red-yellow. This results in more uniform development and improved photosynthesis in hydroponics.
Finally, the automatic thermal management of the SpectraWILD M420 prevents overheating, allows for closer positioning to plants (30-40 cm) without thermal stress, and limits the need for significant ventilation, unlike the HPS, which emits more heat.
In summary, you will gain in yield, light quality, and user comfort while reducing your electrical consumption.
- With a full spectrum light as precise and an integrated dimmer, can we finely adjust the intensity according to the different phases of the SCROG to optimize yields under Samsung LED on 120x60cm?
The SpectraWILD M420 is perfectly suited for a growing area of 120x60 cm and offers a very precise full spectrum, combining red, blue, white, and infrared light to support each phase of the SCROG.
Thanks to its integrated dimmer and compatibility with home automation, you can finely adjust the light intensity from 0 to 100%, allowing you to modulate the lighting precisely according to the needs of the vegetation or flowering in your SCROG setup.
Moreover, its intelligent thermal management ensures stable performance and avoids any risks related to overheating during intensity adjustments, thus ensuring an optimal and secure environment for your plants.
In summary, this Samsung LED system offers ideal flexibility and efficiency to optimize your yields throughout the different phases of the SCROG.
- What is the maximum temperature generated by the SpectraWILD M420 at full power, and what type of ventilation do you recommend to avoid overheating in a 150x90cm grow box?
The SpectraWILD M420 does not deliver a fixed maximum temperature at full power because it incorporates an intelligent thermal management system. This system automatically adjusts the power via temperature probes to avoid overheating and ensure stable performance.
For a 150x90 cm grow box, it is important to ensure effective active ventilation: an air extractor of at least 150 m³/h to evacuate heat, complemented by one or more internal fans to homogenize the temperature. Also, make sure to maintain a distance of 30 to 40 cm between the panel and the plants to limit direct heat exposure while optimizing the light received.
- What is the best dimmer setting to optimize the flowering phase under the SpectraWILD M420 in a 120x60 cm area without overheating the grow room?
To optimize the flowering phase under the SpectraWILD M420 in a 120x60 cm area, it is recommended to set the dimmer between 80% and 100%. This setting allows for full utilization of the 420 W power while limiting thermal stress on the plants.
Make sure to maintain a distance of 30 to 40 cm between the LED panel and the canopy to ensure good light penetration without local overheating. The thermal management system integrated into the SpectraWILD automatically adjusts the power according to the ambient temperature, thereby ensuring stable and efficient cultivation.
- For a cultivation chamber of 80x80 cm, is the light coverage optimal with the SpectraWILD M420, or is it preferable to switch to a smaller model in order to optimize consumption and emitted heat?For a cultivation chamber of 80x80 cm, the SpectraWILD M420 is somewhat oversized. This model, with its 420 W, is designed for larger areas, approximately 120x60 cm to 150x90 cm. Using this panel in an 80x80 cm space will result in greater energy consumption and heat production than necessary.
The SpectraWILD S320, on the other hand, with its 320 W and the same light efficiency (2.7 µmol/J), is ideally suited for 80x80 cm, offering optimal coverage for this area while being more energy-efficient and producing less heat. It allows for precise management of intensity based on your plants' needs.
To optimize both energy consumption and thermal comfort in your cultivation chamber, the SpectraWILD S320 is therefore the best option.
- Is integration possible with voice assistant via Tuya app for remote control and light management?
The SpectraWILD M420 indeed offers WiFi integration that is compatible with home automation and can be controlled remotely via the free Tuya Smart app. You can manage light intensity, program cycles, and centralize multiple units through the SmartWILD console.
Regarding voice assistant (Alexa, Google Assistant), compatibility via Tuya is probable, but not explicitly guaranteed. It is therefore recommended to check this specific function before purchase if you wish for direct voice control.
This system combines modernity and flexibility for efficient automated management of your horticultural lighting.
- What is the best way to synchronize two SpectraWILD M420 in parallel to optimize light management and save energy in indoor cultivation?
To synchronize two SpectraWILD M420 in parallel and optimize both light management and energy consumption, the best solution is to use the SmartWILD console connected via 2.4 GHz Wi-Fi. This console allows you to manage both panels simultaneously, precisely adjust the light intensity, and automate the lighting cycles for each unit.
Thanks to this approach, you benefit from an integrated home automation management that adapts the light periods to the specific needs of your plants, all while enjoying the high efficiency of Samsung's 420W LEDs. Active thermal management also allows the lights to be positioned closer to the plants without overheating, thereby maximizing growth while limiting energy consumption.
In summary: connect your SpectraWILD M420 to the same SmartWILD console, synchronize their cycles and intensities via Wi-Fi, and leverage home automation for uniform and energy-efficient lighting.
- With the home automation management system via application, can different intensity profiles be set between the growth phase and the flowering phase to optimize SCROG with LED?The SpectraWILD M420, equipped with Samsung LEDs, allows you to perfectly set different light intensity profiles suitable for the growth and flowering phases through its SmartWILD home automation application. You can precisely program the intensity for each stage, a real advantage for optimizing a SCROG grow with LED. For example, during the growth phase, the intensity can be adjusted between 40 and 60%, and raised to 80-100% during flowering, promoting balanced development and generous blooming.
- What is the maximum heat emitted by the SpectraWILD M420 and what extraction power do you recommend to limit the temperature in a 150x90cm box?
The SpectraWILD M420 does not deliver an exact maximum temperature, but it features an intelligent thermal management system that automatically adjusts the power to prevent overheating, ensuring stable operation even in warm conditions.
For a box of 150x90 cm, it is recommended to modulate the lighting power between 300 and 420 W, ideally between 70% and 90% of the maximum power, to control the emitted heat.
Regarding extraction, an airflow rate of approximately 400 to 600 m³/h is recommended to effectively limit the rise in temperature in this compact space. This volume allows for sufficient renewal of the warm air produced by the lighting and ensures optimal conditions for your plants.
- What are the practical advantages and limitations of the integrated dimmer for separately managing light power during the growth phase and flowering phase?
The integrated dimmer of the SpectraWILD M420 allows adjusting the power between approximately 300 W and 420 W, which is very convenient for adapting the lighting according to the growth or flowering phase. In practice, this optimizes energy consumption, reduces heating (essential for a passive system without a fan), and promotes efficient photosynthesis due to a well-regulated intensity. Furthermore, control via smartphone and Wi-Fi simplifies management, especially in multi-zone setups.
However, this dimmer has some limitations: the trigger temperature for automatic reduction is not specified, there is a lack of precise data on the PPFD modulated at different powers, which complicates ultra-precise adjustments, and reliance on the home automation console can add complexity or risk in case of connection issues.
Ultimately, this dimmer offers a very good compromise between user comfort and luminous efficiency for indoor cultivation, while requiring a bit of vigilance for the most technical applications.








