Hard Light Bridge

“

These bridges are made from natural light that I pump in from the surface. If you rubbed your cheek on one, it would be like standing outside with the sun shining on your face. It would also set your hair on fire, so don't actually do it. Click to listen — GLaDOS

”

A Hard-Light Bridge (simply known as a Light Bridge,) is a semi-translucent solid made from natural sunlight beamed in from the surface. It can act as a bridge for the player, a shield against turrets and other hazards, or even a wall for more complex puzzles the player encounters later on. The bridges span an infinite length or until stopped by another solid, meaning the player won't have to worry about the length of the bridge being a problem.

Hard-Light Bridges can also be covered in Mobility Gels, allowing the player to use the gels in places where it normally would just fall through. Gels placed on Hard-Light Bridges are not permanent and disappears the moment the bridge dissipates or moves to a different location.

Related achievements

Portal 2

Can't Touch This Dance in front of a turret blocked by a hard light bridge in co-op

Empty Gesture Drop your co-op partner in goo while they are gesturing by removing the bridge under them