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.
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Lawrenceville, GA. 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.