The Obelisk of Light is a powerful defense structure used by the Brotherhood of Nod.
The Obelisk of Light is a shining example of the military applications of LASER technology. Nod invented the weapon due to the need for a powerful defense mechanism for its base, this weapon is the second most powerful laser weapon in recorded history (in par with Obelisk of Darkness, the first being the CABAL Obelisk that's not yet exist in the game files). Massive capacitors underneath the bottom of the Obelisk amass powerful laser, directed aainst enemies via advanced optical and focusing systems. Obviously, it is a "power-hungry" defense structure, which requires massive amount of power to function.