LED lighting question

lindasmith2 · 07/27/2012, 01:21 AM

Hi, This is my first post on the site and am hoping this description of my problem is alright. I have a semi-circle tank 1000mm wide x 1000mm high x 600mm deep. I have been looking around (online) at some LED lights 120w 55 x 3w led's. Do you think this would be strong enought for my tank given that it is 1000mm high? I would most likely go the 60 or 90 degree led options rather than a factory 120, as the tank is not so wide. Or should I go with a 180w light ?

At the moment I am running a LED strip light 3ft long only 72w, I only have a couple of corals at present and are wanting to stock it with more. I also have another problem..... I have heaps of Cyno that comes about 2-3hrs after I turn it on then goes again after I turn it off at night ???

Any help would be much appreciated. Linda

bluewater921 · 07/27/2012, 07:16 AM

hi there linda .. are you sure its cyno cause IMO cyno does not go away when lights are on and off .. if you can post a pic it would help .. for the depth of your tank i would get 2 120watt led fixtures plus how wide is it ..

thegrun · 07/27/2012, 08:04 AM

Welcome to Reef Central. Without knowing the exact fixture it is difficult to answer your question. I would think the LED wattage is okay for your tank (you will want to use the 60 degree or even 40 degree lenses if they are available with your 1000mm (40") depth), but I suspect that you would need two fixtures to get proper light spread. Most LED fixtures with 60 degree or smaller lenses do not give you good spread side to side so I would think your tank is going to need two fixtures.
As to your cyano issue (I suspect the problem is actually with diatoms, not cyanobacteria due to its coming and going with light), more flow and/or less nutrients (nitrates and phosphates) are the key to controlling it (regardless if it is diatoms or cyano).

07/27/2012, 01:21 AM	#1
lindasmith2 Registered Member Join Date: Jun 2012 Location: Mebourne Australia Posts: 3	LED lighting question Hi, This is my first post on the site and am hoping this description of my problem is alright. I have a semi-circle tank 1000mm wide x 1000mm high x 600mm deep. I have been looking around (online) at some LED lights 120w 55 x 3w led's. Do you think this would be strong enought for my tank given that it is 1000mm high? I would most likely go the 60 or 90 degree led options rather than a factory 120, as the tank is not so wide. Or should I go with a 180w light ? At the moment I am running a LED strip light 3ft long only 72w, I only have a couple of corals at present and are wanting to stock it with more. I also have another problem..... I have heaps of Cyno that comes about 2-3hrs after I turn it on then goes again after I turn it off at night ??? Any help would be much appreciated. Linda

07/27/2012, 07:16 AM	#2
bluewater921 Registered Member. Join Date: Jul 2012 Location: melbourne fla Posts: 605	hi there linda .. are you sure its cyno cause IMO cyno does not go away when lights are on and off .. if you can post a pic it would help .. for the depth of your tank i would get 2 120watt led fixtures plus how wide is it .. __________________ if i was a fish i would play on the reef & swim in the surf Current Tank Info: 180 in the wall reef

07/27/2012, 08:04 AM	#3
thegrun Registered Member Join Date: Dec 2008 Location: Garden Grove, Ca Posts: 17,023	Welcome to Reef Central. Without knowing the exact fixture it is difficult to answer your question. I would think the LED wattage is okay for your tank (you will want to use the 60 degree or even 40 degree lenses if they are available with your 1000mm (40") depth), but I suspect that you would need two fixtures to get proper light spread. Most LED fixtures with 60 degree or smaller lenses do not give you good spread side to side so I would think your tank is going to need two fixtures. As to your cyano issue (I suspect the problem is actually with diatoms, not cyanobacteria due to its coming and going with light), more flow and/or less nutrients (nitrates and phosphates) are the key to controlling it (regardless if it is diatoms or cyano).