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Emergency lighting is used on both UNSC and Covenant starships or installations when the main power is down or during battle. Emergency lighting is usually powered by a separate generator so that it does not draw off the main reserves. The color of the light is usually red but can sometimes be yellow or orange with Covenant ships using ultraviolet for it's emergency lighting. It is most essential that these lighting's are used on the bridge, as combat situations will quickly get worse if you can't see what is going on.
- Halo: The Fall of Reach (First appearance)
- Halo: Combat Evolved
- Halo 2
- Halo: The Flood
- Halo: First Strike
- Halo: Ghosts of Onyx