AGL JOURNAL
Deep dives on PPFD, spectrum, efficacy claims, and the manufacturers that actually deliver.
Full-LED greenhouse conversions can raise heating bills in cold climates. Real trial data shows what separates 40% energy savings from a rate hike.
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DLC Hort V4.0 is now utility policy. See which grow lights clear the 2.5 µmol/J floor and verify your fixture before applying for rebates.
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Interlighting puts LED fixtures inside the canopy, not above it. Research and manufacturer specs show real yield gains in tomato and cucumber.
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2026 research shows real-time plant feedback beats fixed light schedules: energy down 6-38%, yield up 13-32%. What commercial growers need to know.
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Passive or active cooling: which LED grow light design protects efficacy and lifetime? A brand-neutral look at the engineering behind the marketing.
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New 2026 research shows why 24-hour lighting injures greenhouse tomatoes, and how dynamic spectrum protocols prevent the yield and quality loss.
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DLC delisted 11% of grow lights on January 5, 2026. If your fixture did not make the V4.0 cut at 2.5 µmol/J, your utility rebate application will be…
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DLC Hort V4.0 set a new 2.5 µmol/J minimum in 2026, delisting ~11% of the QPL. What changed, what was cut, and how to claim utility rebates.
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University of Delaware research found 23-31% light use efficiency gains with dynamic LED scheduling while matching maximum-output yields. Learn the stage-based intensity framework commercial growers use to cut…
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PPFD, DLI, and efficacy in µmol/J are the only three numbers that determine whether a grow light will perform or drain your operating budget. Here's how to read…
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