The name survives from a single cartographic moment: the 1839 edition of the Ordnance Survey six-inch map, which was part of Ireland's first systematic and large-scale national mapping project, carried out in the 1830s. That edition marks it only as a site, already a site even then, situated in the valley of a stream running northwest to southeast. No structure, no feature beyond the name and its translation, a luminous tree that exists now only as two words on a nineteenth-century map.

What the bright tree was, whether a particular ancient tree of local significance, a sacred or boundary marker, or something else entirely, the record does not say. Named trees do appear across Irish placename tradition, sometimes associated with assembly sites, sometimes with ecclesiastical or mythological significance, and occasionally simply with a conspicuous natural landmark. That the mapmakers in 1839 already described it as a site rather than an active place suggests the thing itself had already gone by then, leaving only the memory of what had stood there. Today, the area has been extensively quarried, which means even the valley landscape that once framed it has been substantially altered. The stream may still run, but the ground around it has been reshaped by extraction, and any physical trace that might have remained is likely long gone.