The length of time to keep your lights will depend on the type of aquarium you have running. For a freshwater tank with just fish there really is no set time. Anywhere from 1-12 hours per day will be fine. If the tank is in an area where it gets lots of indirect sunlight or simply is a bright room you can keep the lights on for less time. If it is a very dark room you can keep the lights on longer. This will also hold true for a fish only saltwater tank.
Lawrence County, Illinois. Lawrence County is the easternmost county in the U.S. state of Illinois (excluding water boundaries). According to the 2010 census, it has a population of 16,833. Its county seat is Lawrenceville. Contents.
Sponsored Topics. Thompsonville is a village in Franklin County, Illinois, United States. The population was 571 at the 2000 census. Thompsonville is located at 37Â°54â²59â³N 88Â°45â²42â³W / 37.91639Â°N 88.76167Â°W / 37.91639; -88.76167 (37.916443, -88.761564).