Light Markers

Light Markers are apparently simple illuminatory devices produced by the Forerunner for use on their various installations and possibly other places.

Covenant work lights are small silver colored lights that are found on the ground during many Halo levels, most notably 343 Guilty Spark and Truth and Reconciliation. At first glance, it would seem that these lights are of Forerunner origin due to their placement and appearance. This is unfortunatly disproved by the fact that in Halo: The Flood, the author stated that they were the Covenant work lights. They are placed at areas of high priority or low light conditions, such as a swamp or a desert at night. They are rectangular in shape, project white light, often placed along walls, and point upward.