A sealed active marker apparatus of a performance capture system is described to provide protective housing for active marker light components coupled to a strand and attached via a receptacle, to an object, such as via a wearable article, in a live action scene. The receptacle includes a protrusion portion that permits at least one particular wavelength range of light emitted from the enclosed active marker light component, to diffuse in a manner that enables easy detection by a sensor device. A base portion interlocks with a bottom plate of the receptacle to secure the strand within one or more channels. A sealant material coating portions of the apparatus promotes an insulating environment for the active marker light component.