Aluminium drywall profile APTBH for light cove, ceiling-mounted The aluminium profile APTBH is used for indirect lighting via the ceiling on light coves. It is suitable for plasterboard with a thickness of 12.5 mm and LED strips up to 18 mm wide and max. 30 W per metre. Once installation is complete, the LED strip is no longer visible from the room. The lower edge of the profile is levelled over a large area with the plasterboard and fabric insert and offers a particularly good grip thanks to the grooved surface. The front can be painted to match the wall/ceiling/panelling and visually doubles the visible surface.