Usage: Slightly more durable than destroyers, but more importantly, with much more surface firepower, light cruisers are good for protecting main fleets as escorts.
Cheap (for a ship)-comparable to 4 artillery brigades.Possibly a better proposition than destroyers overall if you don't mind having to research in the Base Strike doctrine branch (the other two are fairly necessary at least for convoy escorting + targeting + battleships and base efficiency). Although still not able to stand up to capital ships in combat, they are far better than destroyers at doing so, at the loss of the destroyer's anti-sub and scouting capability. Weighing in at 6 to 10 thousand tons in displacement, light cruisers form a heavier alternative to destroyers.