A surgical lighting assembly (100) comprises an upper housing (110), with an upper rim arranged (120) around at least a portion of a perimeter of the upper housing, and a lower housing (130), with a lower rim (140) arranged around at least a portion of a perimeter of the lower housing. The upper housing and the lower housing are configured to fit together around their perimeters to define a chamber (250) therebetween. The lighting assembly further comprises a light source (270) in the chamber, a sealing member (170) located between the perimeters of the upper and lower housings, and a plurality of clamping strips (190). The clamping strips are configured to clamp the upper rim to the lower rim around the perimeter of the housings, so that the upper housing is clamped to the lower housing in a sealed configuration.