The influence of the LED light spectrum on the growth and nutrient uptake of hydroponically grown lettuce

P. Pinho, Kari Jokinen, L. Halonen

Research output: Contribution to journalArticleScientificpeer-review

31 Citations (Scopus)


Along with the high energy-efficiency potential, light-emitting diode (LED) lighting provides the possibility for spectrum control. Our study presents the original data on the influence of LED light spectrum quality on the growth and macro- and micro-nutrient uptake of lettuce (Lactuca sativa L. cv. Frillice) plants cultivated in indoor conditions and without daylight. Four LED light spectral combinations were investigated using conventional high-pressure sodium (HPS) lighting as a control. In general, the LED light spectra were more favourable than the HPS light spectrum for promoting the growth and nutrient uptake of plants. In particular, the light spectrum provided by the combination of the far-red, deep-red and blue LEDs had the highest growth and nutrient uptake indices. This spectral combination particularly enhanced the uptake of potassium, calcium and magnesium in comparison to control plants grown under conventional HPS lamps. The uptake of iron and zinc were significantly influenced by the spectral changes of the red and blue light.
Original languageEnglish
Article number642269
Pages (from-to)866–881
Number of pages15
JournalLighting Research and Technology
Issue number7
Early online date2016
Publication statusPublished - 1 Nov 2017
MoE publication typeA1 Journal article-refereed


  • horticultural lighting
  • light spectrum
  • nutrient uptake
  • lettuce
  • micro-nutrients
  • Nutrition content
  • LED lighting
  • horticulture
  • indoor plant cultivation


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