Quinoa (Chenopodium quinoa Willd.) is a grain crop with high nutritional value. The leaves and
sprouts of quinoa can also be consumed either raw or cooked, providing considerably nutritional value
as well as high antioxidant and anticancer activities. This study was carried out to obtain basic data to
assist in the practical design of a plant factory with artificial lighting for the cultivation of quinoa as a
leafy vegetable. We estimated the energy content of the quinoa and the electrical energy required to
produce this crop. The yield was 1,000 plants per day, with a planting density and light intensity of
0.015 m2 (15 × 10 Cm) and 200 μmol·m-2·s-1, respectively. The total number of plants, cultivation area,
and electricity consumption were estimated to be 25,000, 375 m2, and 93,750 μmol·s-1, respectively.
White fluorescent lamps were used at a power of 20.4 kW from 1,857 fluorescent lamps (FL, 55
W), and the cost for electricity was approximately 1,820 dollars (exchange rate of $1 = 1,200 won)
per month. For a daily harvest of 1,000 plants per day in a closed plant factory, the estimated light
installation cost, total installation cost, and total production cost would be 15,473, 46,421, and
55,704 dollars, respectively. The calculated production cost per plant, including labor costs, would
be 27 cents for the 25-day cultivation period, with a marketable ratio of 80%. Considering the
annual total expenses, income, and depreciation costs, the selling price per plant was estimated to be
approximately 56 cents.