Sorry, I should have updated this before.* I bought the cheaper of the 2 (actually I bought one for each of my bigger tanks).* The ones with just one timer.* I also bought 2 lunar lights ( 1 lunar light and a lunar link) for my 20 gallon tank and I bought an expensive light strip that has double white light bulbs, double actinic bulbs and 2 white LED lunar lights all in one for the 37 gallon tank.* The strips work great with both setups.
The ones I bought have 2 daytime outlets, 2 nighttime outlets and 4 outlets that are powered all the time.* With the timer, you choose when you want the daytime items powered and then when they are turned off the nigthtime items power up all night.* * In a way I wish that you could have it so that both the night and day items turned off as well, so that the fish could be in complete darkness sometime during the night, but you can't with this one.* So instead, I just unplug the lunar lights some nights, just to give them some uninterrupted darkness.* Overall, though, I love these power strips and would highly recommend them.* *