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;
• 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, wherein the second period is shorter in duration than the third period, and wherein 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.