Choosing a LED horticultural lamp in 2025? Bulbs, bars, power, spectrum...

Why choose a horticultural LED lamp in 2025?

LED horticultural lamps stand out for several advantages that place them at the top of the choices for growers in 2024:

1. Superior Performance : Where a 400W HPS lamp produces only about 502 µmol/s , a single SpectraWILD S320 delivers over 650 µmol/s , while consuming less energy. This gain in luminous efficiency allows LEDs to optimize photosynthesis while reducing energy costs.

2. Exceptional lifespan : HPS lamps must be replaced 2 to 3 times a year to maintain optimal performance. Conversely, horticultural LED lamps , such as those offered on GrowLED , only lose 3% of their efficiency per year , compared to a degradation of 30% in just 6 months for HPS lamps. This significantly reduces maintenance costs and increases the durability of the equipment.

3. Enhanced Safety : In 2007, our CEO Joseph , founder of GrowLED , unfortunately lost his home due to a sodium (HPS) lamp failure. This tragedy motivated him to move towards safer and more reliable technology. In 2009, he founded GrowLED to provide horticultural LED solutions that are not only efficient but also safer, reducing the risk of fire.

These advantages make LED horticultural lamps an essential choice in 2024, whether for amateur or professional growers.

The different types of horticultural LED lamps

LED grow lights today offer a variety of options to meet the specific needs of growers, whether they work on small areas or in larger grow rooms. Here’s a comprehensive overview of the types of lights available in 2024.

1. LED horticultural bulbs

LED grow lights are a popular choice for small spaces and growers looking for a simple and convenient solution. These lights are particularly suitable for individual plants or small growing areas. Among the options available, the SpectraBULB X20 and SpectraBULB X30 stand out.

• SpectraBULB X30 : This bulb is ideal for growers with limited growing space. It is ideal for growing and flowering a plant on a surface area of 40 cm x 40 cm . Thanks to its compact design, it takes up very little space and is extremely easy to install, even in constrained environments.

Advantages of LED horticultural bulbs :

• Ease of use : They are simple to set up and can be used directly with a standard E27 socket , making them accessible to all growers, whether beginners or experienced.
• Space-saving : Their small size allows them to be installed in areas where space is limited, such as corners of small grow rooms or even shelves dedicated to plants.
• Energy efficiency : Despite their small size, they provide sufficient lighting for plants that require little light, such as aromatic herbs or certain indoor decorative plants.

2. LED horticultural bars

LED horticultural bars are a particularly suitable solution for rectangular spaces or for those who grow several plants in a row. These bars allow you to maximize lighting over a larger area, without losing space or light.

• Examples : Some of the most popular ones include Secret Jardin ’s Cosmorrow , PLED , and SpectraB2G . These bars are available in several sizes (30 cm, 40 cm, 60 cm, and 120 cm), making them flexible and modular to meet the specific needs of each growing space.

Advantages of LED horticultural bars :

• Adaptability : Thanks to their multiple lengths, they fit perfectly into growing rooms, whether to light a spread of several plants or restricted spaces.
• Minimal Space Requirements : Mounted directly above the plants or on the walls of the grow room, these bars are space-saving and do not interfere with ventilation or air circulation in the grow room.
• Uniform Lighting : LED bars provide even light coverage, essential to ensure uniform plant growth , without areas of shadow or insufficient light.

3. LED multi-bar lamps

LED multi-bar lights are the ultimate choice for growers looking for powerful, high-performance lighting systems for medium to large grow rooms . These systems, such as the SpectraWILD , FOG Black Series , or Lumatek ZEUS , are designed to provide intensive lighting over a large area while maintaining controlled energy consumption.

• SpectraWILD : A multi-bar system that guarantees uniform distribution of light across the entire growing surface, thus promoting optimal photosynthesis at all stages of plant development, from germination to flowering.
• Lumatek ZEUS : These lamps are known for their high efficiency and ability to provide customizable light intensity , which is crucial for adjusting lighting to the specific needs of plants at each phase of their life cycle.

Advantages of LED multi-bar lamps :

• Maximum Performance : These lamps are capable of delivering high PPFD (Photosynthetic Photon Flux Density) levels, essential for light-intensive crops such as cannabis or fruit plants.
• Easy installation : Despite their size and power, these systems are easy to assemble, with bars often adjustable in height and tilt to suit the needs of the plants.
• Modularity : Multi-bar lamps allow you to adjust the light intensity and spectrum according to the growing phases, from growth to flowering, thus guaranteeing optimal performance.

4. Horticultural LED panels

LED horticultural panels are an economical solution for growers with tighter budgets , while still providing quality lighting for small to medium-sized areas. These panels, such as the SpectraPANEL or the Rhino Series , typically cover wattages ranging from 100W to 260W , ideal for small growing spaces.

• SpectraPANEL : This LED panel is perfect for a small growing area while offering limited energy consumption. It is ideal for beginners or those growing indoors with limited spaces.
• Rhino Series : This model offers an intermediate solution, with a power of up to 260W , perfect for growers wishing to optimize their space while maintaining control over their energy consumption.

Advantages of horticultural LED panels :

• Lower Cost : LED grow lights are generally more affordable than multi-bar systems or grow bars, making them a great choice for those just starting out or looking to cut down on their budget.
• Quick Installation : Panels are ready to use and install in minutes, without the need for additional equipment or advanced technical knowledge.
• Energy Efficiency : With low electricity consumption, the panels allow you to grow plants without blowing up your energy bill, while maintaining sufficient light for growth and flowering.

How to choose the power of your horticultural LED lamp?

Choosing the power of your LED horticultural lamp depends on several factors, including the size of your growing space and the specific needs of your plants.

1. Cultivation area

A rule of thumb is to plan for at least 200W of power per square meter of cultivation. So, if you have an area of 1 m² , a 200W to 400W panel or lamp will be enough to cover this area.

• For a larger area, such as a 2m² grow room, you will need to use a system with a total power of around 400W to 800W .

2. Type of plant

Some plants, such as tomatoes or peppers , require high levels of light to grow well. In this case, opt for LED systems capable of providing a high PPFD (above 600 µmol/s).

Other plants, such as herbs or leafy greens , will do well with lower light levels, so choosing less powerful lamps is a good idea.

3. Growth phase

The growth cycle of your plants will also influence the choice of wattage. During the growth phase, plants require moderate lighting, while during the flowering phase, more intense light is often required to promote flower and fruit production.

• Modern LED systems, like the SpectraWILD , make it easy to adjust light output and intensity to suit the needs of the plants, making them a great choice for growers looking to maximize their yields.

Understanding the light spectrum of horticultural LEDs

The light spectrum of LED grow lights is one of the most important aspects to consider to ensure healthy plant growth. Unlike older lighting technologies, LEDs allow you to customize the light spectrum to match the specific needs of your plants.

1. Blue light (450 nm)

Blue light is essential for the vegetative growth of plants. It stimulates leaf production and promotes compact plant development. Horticultural LEDs offering a blue spectrum are particularly effective during the early stages of plant growth.

2. Red light (660 nm)

Red light, on the other hand, is crucial for flowering and fruiting . It encourages the production of flowers and fruits, making it a key element for plants in the flowering stage. LED lights, like those offered by GrowLED , are designed to offer an optimal red spectrum, thus promoting high yields.

3. UV and IR light

Some LED grow lights also include UV and infrared (IR) lights, which play a role in stimulating the production of beneficial compounds, such as essential oils and terpenes, in certain plants.

4. What is a full spectrum?

Full Spectrum: an essential asset of horticultural LED lamps

Full Spectrum refers to the ability of LED grow lights to reproduce the entire spectrum of the sun’s natural light, from ultraviolet (UV) to infrared (IR). Unlike traditional lighting systems that emit light limited to certain wavelengths, Full Spectrum LEDs cover a wide range of wavelengths needed by plants at every stage of their development. This includes blue light (450 nm) for the vegetative growth phase, red light (660 nm) to stimulate flowering and fruiting, as well as UV and infrared components that promote the production of resins and beneficial compounds.

Using Full Spectrum lighting simulates an ideal outdoor environment, ensuring that plants receive a full spectrum of light throughout their life cycle, from germination to harvest. This optimizes photosynthesis, promotes healthy growth, and results in higher yields, while ensuring increased fruit and flower quality. This is why Full Spectrum LED grow lights are now the preferred choice for growers looking to maximize the health and productivity of their indoor plants.

Solutions for professional projects

GrowLED , as a member of the Grow & Enhancer group , is a European leader in horticultural lighting solutions. Our teams can support professionals in setting up large-scale projects, whether for commercial crops or research projects.

We offer complete solutions , ranging from horticultural LED systems to the design and installation of turnkey projects . In addition, we offer payment facilities in 3, 4 or 10 times by credit card , as well as 24-hour delivery to meet the urgent needs of our customers.

Conclusion

Whether you’re a beginner or an experienced professional, choosing the best LED grow light in 2024 depends on several factors, such as the size of your growing space, the specific needs of your plants, and your budget. With a wide range of options available, from compact bulbs to powerful multi-bar systems , LED grow lights allow you to grow efficiently, cost-effectively, and safely.

Feel free to check out GrowLED for expert advice on finding the perfect lighting for your grow.