http://forum.aqua-fish.net/ A forum devoted to aquarium fish, plants, techniques and fish keeping as a whole. en http://forum.aqua-fish.net/?topic=a-newbie-amp-8217-s-question#1 For approximately how long should I keep the lights of my aquarium on? Thank you. Rose original post: March 15, 2007, 8:24 am anonymous 2008-05-02 http://forum.aqua-fish.net/?topic=a-newbie-amp-8217-s-question#2 The best is about 10-12 hours. But if you have a shiny room try 10 hours. I have light on from 11:00-21:00 hour. And is it dened on your plants. Some need long time and some only short. Which plants do you have ??? Wampa 2008-05-02 http://forum.aqua-fish.net/?topic=a-newbie-amp-8217-s-question#3 Wampa is right, you have not mentioned the type of aquarium you have, as different types of aquariums have different light requirements. Jodie anonymous 2008-05-02 http://forum.aqua-fish.net/?topic=a-newbie-amp-8217-s-question#4 I have a freshwater aquarium with live plants: Vallisneria rubra Anubias heterophylla Pistia stratiotes Rose anonymous 2008-05-02 http://forum.aqua-fish.net/?topic=a-newbie-amp-8217-s-question#5 hi Rose. The photoperiod required for your aquarium is approximately 10-12 hours. Matt anonymous 2008-05-02