Light & Lettuce

Lettuce is a fast-growing vegetable, including crisphead (iceberg), romaine, loose-leaf, and butterhead types. It generally prefers cool conditions with moderate days and cool nights to prevent bolting.

Lettuce thrives under moderate light levels, with optimal intensity varying by cultivar and photoperiod. Spectrum significantly influences development: full white spectra increase leaf area, fresh weight, and dry weight compared to narrow red-blue spectra. Temporal spectral tuning can further enhance results—e.g., blue-rich light during propagation encourages compact growth and root development, while red light later stimulates biomass accumulation.

We offer efficient LED-based spectral solutions tailored to lettuce cultivation, backed by scientific research and testing. LEDs enable spectral flexibility impossible with HPS and reduce water use by 15.27% and energy consumption for lighting by up to 76%, without compromising yield. Even accounting for supplemental heating due to lost HPS radiant heat, net energy savings range from 10–25%. We support growers with long-term, customized lighting strategies.