So I spend time in the fish room early in the morning before work then a bit at night. I'm in the process of replacing all my analog timers with smart ones that I can program multiple events. There's no downside to leaving the lights on for 2 different periods during the day right? I'm thinking about having them on from 630am to 8am then again from 5pm to 10pm. There's no plants or anything I just don't know if it screws up the fishs' natural cycle?