Optimising Spectral Composition in Hydroponic Lettuce Cultivation: The Role of Green Light, Open Data

This dataset accompanies the manuscript “Optimising Spectral Composition in Hydroponic Lettuce Cultivation: The Role of Green Light”. It contains open data from a controlled-environment hydroponic lettuce trial comparing a red–blue dominant Control with three green-light treatments: fixed 24% green inclusion, incrementally increasing green inclusion from 16% to 32%, and the same incremental regime at 25% greater planting density. The workbook includes treatment metadata, MultispeQ-derived measurements collected at 28 and 35 days after sowing, destructive harvest morphology and biomass data, and post-harvest biochemical assay outputs for chlorophyll, carotenoids, flavonoids, polyphenols and antioxidant activity. Data are organised across four worksheets: Treatment_metadata, MultispeQ, Destructive_harvest and Postharvest_assays.