Conduits act like underwater beacons and theyre effects can be really usefull (night vision, haste, water breathing). And, depending on how you play the game, you might gather he materials for a conduit faster than the materials for a beacon. Yet you can only get the efect if you and the conduit are în water, like, cmon mojang, if i put the conduit in a big aquarium I should be able to get the effect!