OR4 30 bar spread/coverage and spectrum

[JoJosReef]

I'm running an Atlantik V4 -> Icon conversion over a 48"x20"x20" tank and need some supplemental lighting on the sides. Orphek bars would be ideal, but they don't have an 18" bar. They have a 12" and a 24" bar.

I am wondering what the lengthwise coverage of the OR4 30cm (12") bars would be if I put one on either side of the Atlantik front-to back. It would have ~3.5" on either side of the bar to cover if placed in the middle of the 20" width of the tank. Will the light spread to the front and back or leave the corners without light? I also don't know what the side-to-side coverage is like on these bars. I've basically got 4-6" on either side of the tank with insufficient lighting. One bar on either side would cover this, no?


Second question: I am running the Atlantik on the Helio program right now and quite enjoy the whiter spectrum. Would the best bar to complement the Atlantik Helio with a similar spectrum be the Reef Day Plus bars?

Thanks!

 

[TangerineSpeedo]

I have the perfect bars for you! Some Current USA 18" IC Orbits to go with your Current USA tank!
Also maybe think about a couple 48" light bars

 

[oreo54]

I'm running an Atlantik V4 -> Icon conversion over a 48"x20"x20" tank and need some supplemental lighting on the sides. Orphek bars would be ideal, but they don't have an 18" bar. They have a 12" and a 24" bar.

I am wondering what the lengthwise coverage of the OR4 30cm (12") bars would be if I put one on either side of the Atlantik front-to back. It would have ~3.5" on either side of the bar to cover if placed in the middle of the 20" width of the tank. Will the light spread to the front and back or leave the corners without light? I also don't know what the side-to-side coverage is like on these bars. I've basically got 4-6" on either side of the tank with insufficient lighting. One bar on either side would cover this, no?




Thanks!

Depends on the beam angle and the height off the water.
Use this calc to determine spot size.

e.g your 12" bar with a beam angle of 60 degrees (pretty standard for orphek, can request others)
should be roughly 6" off the water surface.
Any higher the more spill outside the tank.
The end led spread is a 7" diameter circle.
Thus 3.5" radius to the tank edge.
For front/back 12" bar centered.. Repeat for left right.
https://store.marinebeam.com/beam-angle-calculator-1/

 

[JoJosReef]

Depends on the beam angle and the height off the water.
Use this calc to determine spot size.

e.g your 12" bar with a beam angle of 60 degrees (pretty standard for orphek, can request others)
should be roughly 6" off the water surface.
Any higher the more spill outside the tank.
The end led spread is a 7" diameter circle.
Thus 3.5" radius to the tank edge.
For front/back 12" bar centered.. Repeat for left right.
https://store.marinebeam.com/beam-angle-calculator-1/

Spot size is diameter of the beam at X inches (throw)? I understand the OR4s have 70deg reflectors, so having it 6inches above the rim would be 8.4 units (in). If I understand correctly, that would mean the light spreads 4.2in from the center of the furthest LED, which should put it right at the edge of the tank, then bouncing down to the corals below.

This seems odd to me, because they design these bars by the foot, so presumably a 48" bar for a 4ft tank. Wouldn't that just bleed a ton of light over the sides of the tank with the last 1-2 LEDs on either end of the bars?

 

[JoJosReef]

I have the perfect bars for you! Some Current USA 18" IC Orbits to go with your Current USA tank!
Also maybe think about a couple 48" light bars

Just looking into it since I won one of the Oprhek bars. I could get a long one to run across the 48" length of the tank, but really the Atlantik is already nuking the middle 36" of the tank, so just a bit on the sides would work best. Might see if they can do the 12" bar and I'll just get a second to finish it off. Could keep or remove the Noops at that point.

 

[mboley]

I'm running an Atlantik V4 -> Icon conversion over a 48"x20"x20" tank and need some supplemental lighting on the sides. Orphek bars would be ideal, but they don't have an 18" bar. They have a 12" and a 24" bar.

I am wondering what the lengthwise coverage of the OR4 30cm (12") bars would be if I put one on either side of the Atlantik front-to back. It would have ~3.5" on either side of the bar to cover if placed in the middle of the 20" width of the tank. Will the light spread to the front and back or leave the corners without light? I also don't know what the side-to-side coverage is like on these bars. I've basically got 4-6" on either side of the tank with insufficient lighting. One bar on either side would cover this, no?


Second question: I am running the Atlantik on the Helio program right now and quite enjoy the whiter spectrum. Would the best bar to complement the Atlantik Helio with a similar spectrum be the Reef Day Plus bars?

Thanks!

The light you have over the tank is already overkill considering the type of corals you're keeping. Have you tried raising the fixture and/or renting a par meter to see what you actually have on the sides?

 

[Reign1]

I was not understanding at first but I would just put a 48" supplemental bar across. I ended up adding a OR4 30" to my Icon and I have a really short 30" cube. You can run two different day cycles between the icon and the bar.

 

[oreo54]

Spot size is diameter of the beam at X inches (throw)? I understand the OR4s have 70deg reflectors, so having it 6inches above the rim would be 8.4 units (in). If I understand correctly, that would mean the light spreads 4.2in from the center of the furthest LED, which should put it right at the edge of the tank, then bouncing down to the corals below.

This seems odd to me, because they design these bars by the foot, so presumably a 48" bar for a 4ft tank. Wouldn't that just bleed a ton of light over the sides of the tank with the last 1-2 LEDs on either end of the bars?

Yea you got it .
And yes there is light bleed at the end of sized equally
.
Note that bars like the Blades have a fair amount of dead space at the ends.
That's why I prefer reflectors over lenses
Also the light falloff pattern is not very uniform IMHO . Heavy center, light ends

Extreme example...

 

[oreo54]

Power consumption 218-235W

80-ish gal tank

You could raise the " icon" higher but it looks pretty good for f/ back coverage atm.

No real need for a full length bars unless you want like 4 w/gallon.
Your end supplimentation seems the most economic way short of just raising the light.

As to what " color" blends best w the Helius program I
have no idea.
It's more of an intensity program than color program.

The Secret of Coral Health, Growth & Color iCon Helius Program

The Secret of Coral Health, Growth & Color Orphek iCon Helius Program,Achieving the optimal coral health, color & growth by using Atlantik iCon Helius Program,

orphek.com

 

[JoJosReef]

The light you have over the tank is already overkill considering the type of corals you're keeping. Have you tried raising the fixture and/or renting a par meter to see what you actually have on the sides?

I have a PARwise and have used that against an Apogee (not on this tank). Sides are getting 25-50 PAR at peak Helio, and I don't plan to run it at the 80% peak. Some light on the sides is going to be required. Right now I have some Noop minis helping.

 

[JoJosReef]

Yea you got it .
And yes there is light bleed at the end of sized equally
.
Note that bars like the Blades have a fair amount of dead space at the ends.
That's why I prefer reflectors over lenses
Also the light falloff pattern is not very uniform IMHO . Heavy center, light ends

Extreme example...

Thanks! This is great!