A cooled modular lighting (1) arrangement and an illuminated cultivation storage system are disclosed. The cooled modular lighting arrangement comprises a coolant channel system (2) including at least one tubular channel section (3), and at least one lighting unit (4) requiring cooling which is attachable, detachable, and re-attachable from the tubular section. Each of the one or more lighting units comprises an elongated groove (6) formed to receive said tubular section when the lighting unit is attached to the tubular section, so that, when the lighting unit is attached to the tubular section, the tubular section provides cooling of the lighting unit without requiring any fluid connection of the lighting unit to the channel system
