Fill lights for UNS 90U

SnowyFox

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I’ve been debating on adding some fill light to the aquarium I’m working on, and would love some feedback on what to go with for it. The AI Blade Glows are currently at the top of my list, but am open to other possibilities. Mainly wanting to try to add as much of the missing violet to light blue spectrum that is missing outside of the 450nm peak.

I currently have a pair of Red Sea ReefLed 90s on the aquarium, and it is housing my African cichlids temporarily while waiting on the live sand / rock I ordered from TBS Saltwater to ship (estimated towards end of January). Trying to use the cichlids to help work through as much of the tank setup process as possible before draining it and resetting it for saltwater.

I really want to get the lighting nailed down before I start adding any corals, as everything I’ve read talks about how you should leave your lighting alone once you have it setup so the corals aren’t constantly needing to (re)adapt to every tweak and change made to the lighting.

The tank is roughly 22”x22”x35” (~70 gallons) setup in a peninsula layout. My plan is to set the tank up as a flowy LPS dominant tank, but with the ability to add a few SPS to it as well down the road.

Most of my inspiration has come from the Flowy Stonies build from the BRS 52SE series.

I think the AI Blade Glows may be the best light to compliment the RL90s, but I am not sure what length would be best for my tank layout. The tank is in my bedroom, and I am trying to eliminate as much light spill as possible.

IMG_8611.jpeg


From the edge of the overflow to the edge of the front glass, is 33”. I’m concerned though that the 30 inch blades might spill into the room if I went with a pair of them.

The other option I was thinking of would be a pair of the shorter 21” blades, along with maybe a 12” blade to mount perpendicular to the others to make a U shape that would help make up for shorter 21” blades.

I intentionally haven’t cut any of the aluminum extrusion down to final lengths yet on the lighting truss. Wanted to leave myself a lot of room to make changes now until I am ready to commit to the final placement of the lights.

I do have a PAR meter to use for getting everything dialed in, just not sure what direction to go on with adding any supplemental fill lights.
 

Spare time

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The red sea reef led is already pretty blue, are you sure you want an even more purple-ish looking tank?
 
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SnowyFox

SnowyFox

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The red sea reef led is already pretty blue, are you sure you want an even more purple-ish looking tank?
My concern is mainly with the coral biology more than aesthetics. The Red Sea lights (like most LED lights out there) seem to have a limited blue spectrum that is mainly centered on 450nm which is great for chlorophyll b, but does very little for chlorophyll a which is more at the 410nm - 430nm range.

My understanding is that corals can and will adapt to the lack of light for chlorophyll a, but that can potentially take months to occur.

 

Spare time

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My concern is mainly with the coral biology more than aesthetics. The Red Sea lights (like most LED lights out there) seem to have a limited blue spectrum that is mainly centered on 450nm which is great for chlorophyll b, but does very little for chlorophyll a which is more at the 410nm - 430nm range.

My understanding is that corals can and will adapt to the lack of light for chlorophyll a, but that can potentially take months to occur.

Red seas light peaks at 437nm. The AI blades are good, but there's other cheaper options if you need to save money, including quanta helix. However, I suspect the blending is much better in the blades and I know they can be mounted close to the water without the par getting focused too much
 

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