The profile looks like a thin decorative line: the width of the light strip is 7 mm. It allows to define corners, accentuate surfaces of walls and ceilings, separate different wall claddings.
Small mounting depth: 12 mm. Improved mounting is notable for a minor coat of putty being used, which prevents cracking of the ceiling while in service. Protective corners of the housing prevent damaging of the diffuser during mounting.