How long should a golf cart battery take to fully charge?

My golf cart has six batteries in dat joint and i need to no how long it take to charge all dem joints.|||2-4 hours after 18 holes of golf.|||Charge them until DAT green light on DAT charger turns on. May Dat it takes longer if the DAT battaries are real low or maybe dat they only need a little of dat charge to become full so you can ride off into the sunset.