The morphology of the cherry young tomato plants was found to be significantly different under different light intensities (Table 2).50 mol m−2 s−1 induced the lowest biomass, stem diameter and health index in plants, and 550 mol m−2 s−1 induced the highest biomass, stem diameter and health index. PPFD of 50, 150 and 200 mol m−2 s−1 induced, in that order, significantly longer stem and lower fresh weight, dry weight, stem diameter and health index than the values of other young plants. When PPFD increased from 50 to 550 mol m−2 s−1, a decrease in the SLA was observed. The PPFD of 300 mol m−2 s−1 or greater increased the biomass and heath index of the young tomato plants. Under 300 mol m−2 s−1,the energy efficiency was the highest and there was no substantial gain from a PPFD above 300 molm−2 s−1.