Horticulture Lighting Group Pack: The benchmark LED lighting for your indoor grows

Horticulture Lighting Group Packs represent the best in LED lighting for indoor cultivation. This American brand has established itself as the absolute benchmark thanks to its Samsung LM301B and LM301H diodes, which deliver exceptional luminous efficacy of 2.7 µmol/J. When it comes to yield and spectral quality, HLG is high-end that makes a difference to your harvests.

Why choose Horticulture Lighting Group lighting

HLG's strength is first and foremost its astonishing energy efficiency. Their quantum boards consume 40% less than an equivalent HPS while producing more useful light for plants. We're talking about latest-generation Samsung diodes mounted on aluminum heat sinks that perfectly dissipate heat. The result: no forced ventilation needed and a lifespan exceeding 50,000 hours.

HLG's full spectrum perfectly covers plant needs from germination to harvest. With a peak at 660nm (deep red) and a solid base at 450nm (blue), their LEDs stimulate both photosynthesis and secondary metabolite production. It's this scientific approach that has led HLG to equip the largest American vertical farms today.

How to choose your Horticulture Lighting Group pack

To choose the right HLG model, it all starts with your growing area. Allow approximately 35-40W per square foot (0.09m²) for optimal lighting. An HLG 100 perfectly covers 60x60cm, while an HLG 320 can illuminate up to 120x120cm during flowering. The height of your space also matters: HLG quantum boards have a diffusion angle of 120°, which requires a minimum of 40cm of height for homogeneous distribution.

In terms of budget, HLGs are a long-term investment. While more expensive to purchase than an HPS, they quickly pay for themselves through electricity savings and the absence of bulb changes. Not to mention that reduced heat saves you on air conditioning in summer. For beginners, the 100-135W series models are perfect, while experienced growers opt for 320W and above.

Frequently asked questions

Which Horticulture Lighting Group lamp should I choose depending on the type of plants I grow?

For leafy greens like lettuce and spinach, an HLG 100 or 135 is more than sufficient with its blue-rich spectrum that promotes vegetative growth. Aromatic herbs like basil or mint love the full spectrum of HLGs, particularly effective for developing essential oils. For decorative houseplants, a more compact model like the HLG 65 provides just enough light without glare. Tomatoes, peppers, and other fruits require more power: aim for at least an HLG 240 to have enough deep red during flowering.

What is the difference between Horticulture Lighting Group LED models and how do I know which one is suitable for my growing area?

HLG models differ mainly in their power and format. HLG 100-135W are compact quantum boards perfect for 60x60cm, while HLG 240-320W use multiple boards to cover 90x90 to 120x120cm. "V2" models incorporate the latest Samsung LM301H diodes, which are more efficient than the LM301B of earlier generations. To calculate, allow a minimum of 35W per square foot during flowering: a 100x100cm space (approximately 11 square feet) therefore requires a minimum of 385W, i.e., an HLG 400 or two HLG 200.

How to properly install and adjust a Horticulture Lighting Group lamp to avoid burning my plants?

Installing an HLG requires respecting recommended distances: 45-60cm during growth, 30-45cm during flowering depending on power. Always start higher and gradually move closer, monitoring for signs of light stress (leaves turning white or curling). HLGs are dimmable, so start at 50% power for the first few days then gradually increase. Use a lux meter or, better yet, a PAR meter: aim for 200-400 PPFD during growth, 600-900 PPFD during flowering. The beauty of quantum boards is their homogeneous diffusion, which avoids hot spots unlike COBs.

Do Horticulture Lighting Group lamps really consume less electricity than other brands and what is the return on investment?

With 2.7 µmol/J, HLGs are among the most efficient LEDs on the market, ahead of most Chinese brands which top out at 2.0-2.3 µmol/J. Concretely, an HLG 320W replaces a 600W HPS while consuming 47% less. For 12 hours/day of cultivation, this represents 1000 kWh saved per year, or approximately €150-200 depending on your electricity rate. Add in air conditioning savings (less heat to dissipate) and the absence of bulb changes, and your HLG pays for itself in 18-24 months maximum. After that, it's pure profit for at least 8-10 years.

How to adapt the light spectrum of my Horticulture Lighting Group lamp between the growth phase and the flowering phase?

Recent HLGs offer a fixed full spectrum optimized for all phases, but some models have separate UV/IR or deep red channels. During growth, use the full spectrum at moderate intensity (50-70% power) to promote compact and vigorous development. During flowering, push to 100% and activate red/IR channels if available to stimulate resin production and maturation. The HLG secret is that even their "white" spectrum already contains enough deep red (660nm) for optimal flowering, unlike classic white LEDs that are too poor in this crucial area.