The Sentry (Marvel) has the ability to generate, control, and emit photon particles of light. The power to manipulate light. Sub-power of Electromagnetism Manipulation and EM Spectrum Manipulation. The opposite of Darkness Manipulation.
Robert Reynolds became the Sentry, one of the first and mightiest superheroes after ingesting an experimental super-soldier formula. He is trapped in a constant battle with his darker side known as the Void. Most recently, the Sentry was resurrected by the Apocalypse Twins as one of their Horsemen, the Horseman of Death.