Does supplemental lighting make sense for my crop? empirical evaluations
Supplemental lighting is recommended when the DLI inside the greenhouse is not meeting the anecdotal cropspecific minimum DLI (typically 10 12 mol m 2 d 1) For example, a greenhouse with DLI of 8 mol m 2 d 1 requires 4 more moles DLI by supplemental lighting to meet the minimum recommendation for tomato of 12 mol m 2 d 1 (Dorais, 2004) However, while growers can assure acceptable production levels under these DLI, a question of whether use of electrical lighting (LEDs, HPS, etc. can generate profit or not needs to be answered before making the investment.