Concerned about light spill from LED bars. Should I match led bar size to tank size or go smaller?

Jorda320

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Hi,

I have a 75 gallon reef tank that I'm cycling and have 80/20 fixtures attached with the intent to buy the orphic or the reef bright LED bars. I have the 80/20 fixture about 16-in off the water, and intended to attach the bars to leave enough room to maneuver the screen to open with the lights being about 12 inches or so off the water. They're on sale right now for Black Friday and as I look at them online I am getting concerned that matching the 48-in LED bar to a 48-in tank 12-in of the water might give me some serious light spill. Since I am mostly doing a mixed reef I don't necessarily need tremendous par, and I was wondering if a few 36-in strips would be more appropriate (considering 2 blue and 1 daylight)? I would like to get decent par and spread however I hate the look of the blue light on the walls when the lights are too high. I'm just looking for any input at all. Thank you very much
 
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just4plaay

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My light bars don't have much soil at all. I think LEDs are pretty focused to get the PAR out of them. If it were me I'd go tank length to prevent dark spots at either end.
 

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Nargard

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My light bars don't have much soil at all. I think LEDs are pretty focused to get the PAR out of them. If it were me I'd go tank length to prevent dark spots at either end.
How do you like your LED strips? I'm considering

Current USA Orbit Marine IC PRO LED 4336 Dual Light Fixture with LOOP Bluetooth Control - 36 - 48 Inch​

for my 22 long nano reef build.
 
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Bepis

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How do you like your LED strips? I'm considering

Current USA Orbit Marine IC PRO LED 4336 Dual Light Fixture with LOOP Bluetooth Control - 36 - 48 Inch​

for my 22 long nano reef build.
If your doing a reef. Do yourself a favor and spend the money. A budget light I have heard good things about is the necrew hyperreef. How long is your tank?
 

Bepis

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Hi,

I have a 75 gallon reef tank that I'm cycling and have 80/20 fixtures attached with the intent to buy the orphic or the reef bright LED bars. I have the 80/20 fixture about 16-in off the water, and intended to attach the bars to leave enough room to maneuver the screen to open with the lights being about 12 inches or so off the water. They're on sale right now for Black Friday and as I look at them online I am getting concerned that matching the 48-in LED bar to a 48-in tank 12-in of the water might give me some serious light spill. Since I am mostly doing a mixed reef I don't necessarily need tremendous par, and I was wondering if a few no no 36-in strips would be more appropriate (considering 2 blue and 1 daylight)? I would like to get decent par and spread however I hate the look of the blue light on the walls when the lights are too high. I'm just looking for any input at all. Thank you very much
I have the OR3s 12” over my tank and pretty close to the edge. They are pretty focused with about a 45degree spread. So the spill is minimal.
 

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