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. Lawrenceville is a city in and the county seat of Gwinnett County, Georgia, in the United States. The Census Bureau estimates the 2008 population at 29,258. Lawrenceville has six ZIP codes (30042-30046, 30049); it is part of the 678/770/404 telephone area code, which is used throughout metropolitan Atlanta. Lawrenceville was incorporated by an act of the Georgia General Assembly on 15 December 1821.