Combine Lights are portable light sources used to illuminate dark areas in support of Combine operations. They are often mounted on walls or tripod bases, and can be found in many areas, from small outposts to inside the Citadel itself. Interestingly enough, the beam's direction is not directly tied to the direction the device itself is facing. These devices produce a bright, turquoise-colored light. Most of them are not visibly connected to anything and appear to have an internal power source, while some lights on the rock face around the Citadel are connected to it by wiring.
A Combine Light lighing up an area for Combine Soldiers.
 List of appearances
- Half-Life 2 (First appearance)
- Half-Life 2: Raising the Bar
- Half-Life 2: Deathmatch (Non-canonical appearance)
- Half-Life 2: Lost Coast (Non-canonical appearance)
- Half-Life 2: Episode One
- Half-Life 2: Episode Two