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From photobiology to dynamic lighting strategies in greenhouse production

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2 months ago

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Greenhouse growers are working in conditions where crop yield and energy use must be managed simultaneously. According to Timo Spruijt, Chief Customer Officer at RED Horticulture, this requires a shift from fixed lighting schedules to approaches based on plant light responses.

“Lighting is moving from static control to measured and predictable strategies,” says Timo. “That starts with understanding how plants react to light and translating that into everyday decisions.”

© RED Horticulture

This approach is based on photobiology, which links plant development to light conditions. Two parameters are central: intensity and spectrum. Light intensity affects photosynthesis, biomass accumulation and yield, while spectrum affects morphology, flowering, rooting and nutritional composition. Paul Vailhen, photobiologist at RED, points out that these factors must be managed together. “Focusing on one parameter without the other limits how plants use light. The interaction between intensity and spectrum determines photon efficiency.”

He explained that growers can use this knowledge to target harvests more precisely. “When photobiology is applied in practice, lighting becomes a management tool rather than a fixed input.”

Three areas
To support this, RED Horticulture organizes its offer around three areas: luminaires, control platform and agronomic orientation. These components are intended to respond to changes during the day and during the cultivation phases. “The needs of the plants are not constant,” says Timo. “Lighting strategies must follow these variations.”

The MyRED platform is used to translate greenhouse data into lighting decisions. Growers can monitor performance and adjust lighting strategies through a dashboard. “The platform allows producers to define and modify their light recipes and evaluate the results,” explains Timo. “It links crop data with energy use.”

He added that implementation goes beyond software. “Support continues after installation. We work with growers to set goals, apply strategies and adjust over time.”

Energy use
Energy use is a major factor in greenhouse operations. Timo connects lighting strategies directly with consumption. “Understanding how intensity and spectrum affect power use helps growers manage their energy input,” he says. “This could lead to changes in the way lighting is applied during the day.”

Automation is also part of today’s greenhouse practices. The system can adjust the lighting throughout the day according to predefined strategies. “Automation reduces manual adjustments and keeps light levels consistent,” says Timo. “It also allows control over the entire light output.”

He noted that automated control can contribute to additional energy savings beyond the performance of the luminaires. “When strategies are applied dynamically, further reductions in energy use are possible.”

Research
This is another part of the research approach. Through the Photobiology and Agronomy Research Center (PARC), RED Horticulture conducts trials under controlled conditions. Timo explains how this relates to commercial production. “Trials allow strategies to be tested before implementation. Producers can then apply these results with a clearer view of expected outcomes.”

The goal is to make photobiology applicable to different crops and growing environments. “The same principles can be adapted to different varieties and production systems,” says Timo. It concludes by returning to the role of knowledge in greenhouse management. “Understanding photobiology is the starting point. From there, growers can build lighting strategies that match crop requirements and energy constraints.”

For more information:
RED Horticulture
World Horti Center
Europe 1
2672 ZX Naaldwijk
+31 174 705 617
horticulture.red/

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Columbia hemp business Burning Acre to close and move to North Carolina over new Tennessee rules

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9 hours ago

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June 14, 2026

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Burning Acre, a Columbia, Tennessee-based hemp company, says it will close its retail store and move operations to North Carolina ahead of new state regulations that take effect July 1, according to WSMV.

The business says its last day to open in Columbia will be June 30, the same day the Tennessee Department of Agriculture licenses for hemp-derived cannabinoids expire. As of July 1, businesses that continue to operate in the state will be required to be licensed under a new regulatory framework led by the Tennessee Alcoholic Beverage Commission.

Burning Acre says the changes have forced it to abandon plans for a new sandwich shop and bakery and close its Tennessee retail operations and relocate to Murphy, North Carolina. “I won’t sugarcoat it, it’s a very hard video for me and a message I should never have written,” the business wrote.

The business puts the annual cost of manufacturing, distribution and running the retail store at about $750. Under the new rules, he says, those costs would rise by tens of thousands of dollars, citing new licensing fees, a required $25,000 annual bond and increased testing fees.

The law, which took effect in July, changes the regulation of hemp-derived cannabinoid businesses from the Department of Agriculture to the ABC. The Department of Agriculture stopped issuing licenses at the end of 2025, and the licenses issued by the TDA will remain valid until June 30, 2026.

“Columbia, we absolutely love being a part of this community,” said Burning Acre. “We are truly heartbroken to have to say goodbye to this location.”

Read more at WSMV4










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North Carolina Lawmakers Advance Bill To Set A Minimum Age Limit For Hemp And Kratom Products

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9 hours ago

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June 14, 2026

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“Many other details about cannabis have been debated and will continue to be debated.”

By Christine Zhu, NC Newsline

Lawmakers in North Carolina are considering banning people under 21 from buying or possessing certain hemp-derived consumables, including combustible hemp flower, hemp cigarettes, gummies and drinks, or items that include the drug kratom.

The House Agriculture and Environment Committee approved a rewrite of Senate Bill 59 on Wednesday. This is the latest attempt by state legislators after years of proposals to regulate the sale of hemp products that didn’t work out in the end.

This measure would prohibit companies from selling such products to under-21s. If the seller has “reasonable grounds” to believe that the buyer is under the age of 21, the seller must verify the buyer’s ID.

Rep. Jimmy Dixon (R-Duplin), who introduced the bill, said he was motivated to bring public attention to issues surrounding cannabis. He said there was a 14-year-old boy in his neighborhood who had an emergency after buying a hemp-derived product.

“There are a lot of other details about cannabis that have been debated and will continue to be debated, but ladies and gentlemen, to make sure we have the good sense to be agents of these kinds of issues, that’s the lowest hanging fruit,” he said.

Violators would face a Class 2 felony, as well as a fine of $500 for a first offense, $1,000 for a second offense and $1,500 for subsequent offenses.

asked Rep. Pricey Harrison (D-Guilford). of the bill language resulted in potential changes to hemp-derived products. It is common for manufacturers of synthetic recreational drugs to make changes to the chemical composition of their products to avoid legal bans or restrictions.

“I assume the definition as written is broad enough to capture any future manipulation of molecules,” he said. Dixon nodded.

Legislators also voted in favor correction To add kratom products to the under-21 ban.

Rep. Jeffrey McNeely (R-Iredell), who proposed the amendment, said it was necessary to add those elements to the bill.

“I’ve been working on this for quite some time, trying to get these bills passed,” McNeely said. “We definitely have a problem. So I’m hoping we can keep posting this and we’ll get something done before we get out of the short session here.”

Both the amendment and the legislation passed unanimously without debate.

The bill moves next to the House Rules Committee. Other amendments will be heard when they appear on the House floor, which could be as soon as next week.

This story was first published by NC Newsline.

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GreenTech Amsterdam 2026 in 2026 photos

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1 day ago

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June 13, 2026

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Well, it’s not 2026 photos, but with around 600 photos, we definitely did our best. For the past two days, the Netherlands has been the place to be for the global greenhouse industry. From Flower Trials for the horticulture sector, company visits to growers and technical suppliers, as well as dinners, get-togethers, drinks, knowledge sessions and much more. And of course with GreenTech Amsterdam.

The event brought together professionals from around the world to connect, network, share knowledge and do business.

Next week, we’ll be sharing more information on market developments, trends, what’s on display, news, business news, innovations and whatever else you can think of, but for now we’ll stick to photo reporting.

Click here for the photo report.

© Arlette Sijmonsma | MMJDaily.com










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