|"Bioluminescent cells within the agent's retina provide coherent illumination of the agent's field of view."|
|— Deus Ex description|
It is a non-upgradeable augment that is installed at the start of the game.
The only disadvantage of Light is it can compromise an agent's stealth. It can be spotted by enemies, disclosing its source location.
JC Denton has this augmentation already installed in 2052 when he begins his first mission in Liberty Island. In 2072, Light does not expend energy, but only illuminates the area immediately around the user. Alex Denton has this augmentation by the time they arrive at the Tarsus Academy in Chicago.
- In Deus Ex, an alternative to Light which does not consume energy could be the Dragon's Tooth Sword. However, the weapon creates little light. In Deus Ex: Invisible War, a beam of light can be created by a pistol.