DLC Horticultural V4.0 requires at least 2.5 µmol/J (applications from Apr 2025)
designlights.org (opens in a new tab)
LGT · system
Lighting
Supplementary LED light extends the growing day and lifts yield. Inter-lighting puts the light inside the canopy.
What's in the system
- DLC-listed LED top-lights
- LED inter-lighting strips
- Dimming controllers driven by PAR sensors

World benchmark.
The best published result for this system. Each figure links to its public source.
GreenQ trial: 100.6 kg/m² of tomato under LED top-light and inter-light
hortidaily.com (opens in a new tab)Make vs buy
Buy DLC-listed fixtures; soilin.tech handles control and integration.