All remodeled Light Carriers have 4 equipment slots, except Houshou, who has only 3.
Light Aircraft Carriers can attack submarines.
Chitose and Chiyoda start as Seaplane tenders (AVs); in addition to only launching seaplanes, they gain two Type A Ko-Hyoteki midget subs at their level 12 remodels for preemptive torpedo strikes. Their next remodel, at level 15, changes their class into light aircraft carriers. With this remodel, they will lose the ability to launch seaplanes and midget subs, and instead, be able to launch carrier planes like other CVs/CVLs. It's the player's choice on whether to continue as an AV or a CVL.
Ryuuhou starts as Submarine Tender (AS) named Taigei. There are three quests (A37, D13, D14) and an expedition (#39) that requires her as AS, so it is recommended to complete all three quests before remodeling her to a CVL.
Houshou, Ryuujou, and the Shouhou-class are a good choice for expeditions that require a CVL (especially Expedition 15).