Pulse laser turret

The Pulse Laser Turret is a Covenant starship weapon that can fire on both space and ground targets. These turreted beam weapons are known to have been mounted on Covenant Destroyers, Covenant Heavy Cruisers, and Covenant Carriers. Strangely enough, UNSC Prowlers also have these energy weapons: highly unusual, as United Nations Space Command starships typically utilize projectile or explosive weaponry.

Physics
Before the weapon fires, it must first charge, during the charge a sphere of light energy forms at/around the charging weapon, and after it is charged, it expels a cyan beam of energy.

Damage
The weapon is said to have reduced the UNSC frigate Commonwealth's armor in sections three and four to a quarter which would mean (as frigates are known to have 60cm-thick armor) that a pulse laser salvo is capable of melting through 45cm of titanium A battleplate in mere seconds. This means that pulse lasers pose a serious threat to UNSC frigates (and presumably smaller and lighter armored UNSC ships) as it only takes one salvo to melt through parts of it's armor however, it is believed that, larger UNSC ships which have thicker armor would have to take multiple pulse laser salvos to get the same results.