what light range am i in? - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 05-20-2010, 01:17 PM Thread Starter
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what light range am i in?

I have 3 27watt (100w) 5000k flourecent bulbs from home depot on top of a glass cover. The tank is a 20 long with 3" eco complete substrate. What lighting range does this put me in? I usually leave the lights on for 12 hours a day. Thanks for your help.
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post #2 of 6 (permalink) Old 05-20-2010, 04:19 PM
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You probably have those spiral, powersaver bulbs mounted horizontally above the tank. If so, you probably have medium intensity, possibly in the high end of medium intensity. Running the lights longer than 8 hours a day generally doesn't help the plants nearly as much as it helps the algae.

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post #3 of 6 (permalink) Old 05-20-2010, 04:38 PM Thread Starter
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They are vertically mounted with aluminum fixtures. So the open end of the fixture is facing the tank.Sweet thanks for the info. I'll try to get the lights down to 8 hours a day. Its hard when you work 9 hours LOL. Maybe now I can pick up some stems to add to my low light stuff.
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post #4 of 6 (permalink) Old 05-20-2010, 09:46 PM
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post #5 of 6 (permalink) Old 05-20-2010, 11:23 PM
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Originally Posted by dal924 View Post
They are vertically mounted with aluminum fixtures. So the open end of the fixture is facing the tank.Sweet thanks for the info. I'll try to get the lights down to 8 hours a day. Its hard when you work 9 hours LOL. Maybe now I can pick up some stems to add to my low light stuff.
Do you have reflectors with the bulbs? If so, you have high light intensity, and need to be using good CO2 in order to avoid lots of algae problems down the road. Those bulbs put out a lot more usable light when mounted vertical, with good reflectors. See http://www.plantedtank.net/forums/li...tml#post904062 and read the thread from the beginning.

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post #6 of 6 (permalink) Old 05-21-2010, 12:24 AM
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+1 They make life a lot easier

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