LED luminaire (10, 100, 200) for line illumination comprising an elongate trunk (12, 120, 220) having a first end portion (13, 121) and an opposite second end portion (15, 122), an elongate lighting carrier (14, 140, 240) comprising at least one LED based light source to form a continuous line of light, a first coupling member (142a, 142b) for detachably fastening the lighting carrier (14, 140, 240) to the trunk (12, 120, 220), and a second coupling member (134, 234) arranged for longitudinally connecting the trunk (12, 120, 220) in line with an adjacent trunk (12, 120, 220) of an adjacent LED luminaire (10, 100, 200) thereby forming a self-sustained trunking system. Detaching of the lighting carrier (14, 140, 240) is allowed in substantially a transverse direction with reference to the line of trunks (12, 120, 220), and without dismounting the trunk (12, 120, 220) from the trunking system.