Cultivation Guides
Grow with The Lighting Knowledge Company
Learn how the right lighting system can improve your crop with P.L. Light Systems’ cultivation guides. 45+ years of horticultural lighting experience, distilled into what drives plant growth and how to choose the right grow light for your application.
Crop-specific cultivation guides
Start with what you grow
Light environment concepts, growth-stage strategies, and system recommendations for each major crop category.
Crop Guide
Leafy Greens Cultivation Guide
Light environment concepts for lettuce, microgreens, culinary herbs.
Crop Guide
Vine Crops Cultivation Guide
The definitive guide to tomato, cucumber, and pepper cultivation in relation to the light environment.
Crop Guide
Cannabis Cultivation Guide
Lighting environment effects, growth-stage strategies, HID / LED / hybrid comparisons.
Crop Guide
Ornamentals Cultivation Guide
Light environment concepts for cut flowers, bedding plants, and flowering potted plants.
Grower's & technical guides
Beyond the crop basics
Installation, rebates, ROI, retrofit strategy, research findings, and system efficiency. What to read before you spec, install, or upgrade.
Research Report
Cannabis Lighting Research Report
Spectrum impact research. Hybrid LED + HPS compared to traditional HPS-only systems.
Grower's Guide
Retrofit Guide · LED, HPS & Hybrid
Switching from HPS to LED. Retrofitting magnetic-ballast to electronic HPS. Evaluating hybrid systems.
Practical Guide
Installing Your Luminaires Guide
Voltage selection, new installations and retrofits, power supply and wiring for LED / HID applications.
Grower's Guide
Energy Rebate & Incentive Guide
Qualifying lighting types, utility rebate mechanics, US and Canada application processes.
Grower's Guide
ROI Guide · LED vs. HPS
Comparative analysis with real calculations. ROI considerations and energy-emission differences.
Practical Kit
Lighting Performance & Efficiency Kit
Maintenance, yield optimization, system selection guidance. Multi-document kit.
Why we publish
The Lighting Knowledge Company
We’ve spent 45+ years figuring out what works in commercial horticultural lighting. We publish what we learn, from crop-specific light strategies to retrofit and ROI planning. Spec sheets and product instructions are always free on the Resources & Downloads page.
Related
More research and tools
143+ articles
Longer-form technical writing on PPFD, DLI, fixture selection, canopy strategy.
Technical downloads
Spec sheets for every fixture, warranty documentation, and maintenance guides.
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