The Construction Beam is a type of laser beam used exclusively by Sentinel Constructors (Although you can see a Sentinel using it on The Arbiter). The beam itself is very thin, at least 1/2 millimeter wide, and is a light green color. It is super-heated, similar to the Sentinel Beam, and is used strictly for the purpose of repairing Forerunner facilities. It's power is very weak in comparison to its Sentinel counterparts, but it may be focused to allow repairs rather than damage to sentient beings. The Construction Beam is not supposed to be used as a weapon, as it does minimal damage to nearly all organisms, but the Constructor will not stop if something blocks the beam. It is for this purpose that the Constructors count on the Sentinels for protection from hostile forces. The beam is usu