Freshness of fruit and/or vegetables

A lighting system for illuminating plant items in a food storage facility or display comprising:

• a luminaire arranged to provide a first light output and a second light output, the first light output having a higher intensity and at least a red-bias spectrum relative to the second light output, the second light output being white, and the first light output having a spectrum with a peak wavelength of 660 nm;
• and
• a controller for controlling the first and second light output by controlling the luminaire,
• wherein the controller is configured to apply a sequence, at least once a day, comprising a first period of darkness, followed by a second period with the first light output, then a third period with the second light output, the second period is shorter in duration than the third period, a total intensity of the second light output of the third period is less than a total intensity of the first light output of the second period, a total of 15 to 50 μmol/s/m2 of photons are output by the first light output total in the second period, and a total of 2 to 15 μmol/s/m2 of photons are emitted by the second light output total in the third period.