Metal halide SPS growth rate

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I found 2 Lumenarcs but the 400 touches the reflector. Would be good for 250's. Touching the reflector it was putting out 350 par with the LA and digital.

20251210_141841.jpg

20251210_141829.jpg
Those are not Lumenarc. They are called Lumen Max Elite. Very good, well made reflectors.
Please, do not even worry about PAR when qualifying any metal halide fixture. That is a useful way to make sure LED fixtures won't burn your corals, not particularly important for any metal halide fixtures/reflectors.
 
Those are not Lumenarc. They are called Lumen Max Elite. Very good, well made reflectors.
Please, do not even worry about PAR when qualifying any metal halide fixture. That is a useful way to make sure LED fixtures won't burn your corals, not particularly important for any metal halide fixtures/reflectors.
Thanks
 
Those are not Lumenarc. They are called Lumen Max Elite. Very good, well made reflectors.
Please, do not even worry about PAR when qualifying any metal halide fixture. That is a useful way to make sure LED fixtures won't burn your corals, not particularly important for any metal halide fixtures/reflectors.
Thought you might like to see this.
My current 1 month old ext 112.
LumenBright reflector.
400 watt Hamilton 20K.
Digital ballast.
2 Meridian edge 14K bars.
35lbs live rock
19 current tester frags
Par with edge at 75% is 450-525 on the rack.
With the ReefBright reflector 275-350 par on the rack.
Going with the LB and a Ushio 10K par is over 700.
People dont really understand what people talk about until you see halides in action side by side.
As nice as my leds systems are the halides still are hard to beat.
20260328_125704.jpg
20260411_144429.jpg

20260328_125307.jpg

20260412_121412.jpg
 
Last edited:
Those are not Lumenarc. They are called Lumen Max Elite. Very good, well made reflectors.
Please, do not even worry about PAR when qualifying any metal halide fixture. That is a useful way to make sure LED fixtures won't burn your corals, not particularly important for any metal halide fixtures/reflectors.
Thought you might like to see this.
My current 1 month old ext 112.
LumenBright reflector.
400 watt Hamilton 20K.
Digital ballast.
2 Meridian edge 14K bars.
35lbs live rock
19 current tester frags
Par with edge at 75% is 450-525 on the rack.
With the ReefBright reflector 275-350 par on the rack.
Going with the LB and a Ushio 10K par is over 700.
People dont really understand what people talk about until you see halides in action side by side.
As nice as my leds systems are the halides still are hard to beat.
20260328_125704.jpg
20260411_144429.jpg

20260328_125307.jpg

20260412_121412.jpg
Sick! I’m going to be using Reef Brites with 14k from Aqua Bright Solutions and Meso Blue Helix from Quanta for my 310.
 
Sick! I’m going to be using Reef Brites with 14k from Aqua Bright Solutions and Meso Blue Helix from Quanta for my 310.
Cool! I am now running a Ushio 20K. This bulb really brings the color. Its better than the others I currently have on hand at this point.
20260516_152558.jpg
 
This thread is getting me excited to run halides again! Has anyone run the Aqua Brite 400W 20K's? If so, how do they compare to the 400W Radium's? I want that growth and color back!
Searching online real fast we find these charts:

These 2 below show the spectrum charts for the Radium 400W, 20000K:

Screenshot 2026-05-19 at 5.48.44 PM.png


Screenshot 2026-05-19 at 5.49.30 PM.png


The chart below is from the Aqua Bright solutions' web site showing the 20000K:

Screenshot 2026-05-19 at 5.53.52 PM.png


https://aquabrightsolutions.com/products/copy-of-400-watt-14-000k-metal-halide-mogul-base-bulb
I'm very happy to see the spectrum charts displayed on the Aqua Bright's web site!

I wish people would look at the charts and understand that those charts alone should be one of the most important aspects when deciding lighting, to offer the very best to their reef system!
 
I normally don't like to watch much these days. I prefer to have some fun and also do maintenance on my tanks at home when I'm done with work. This video was suggested on YouTube and Its a great example to those who want to try halides, specially with SPS.
I don't necessarily agree with some of the thoughts and personal preferences in this video, but it is the best example to see the differences between corals placed under metal halides and under LEDs with the 2 systems connected. Pay attention to the corals under metal halides! Profusely growing and amazing colors!!! We can see the difference in colony formation between the 2 technologies. The majority of corals under the LEDs look distorted and struggling to me. It's so evident! Some of the small colonies under halides are still showing distorted growth and are adapting to the halides, which can take months to say the least. I don't agree with that "advantage of color manipulation" as it would look "better" for some species under different lights. I prefere to offer the best quality light spectrum from halides. Just me. But I respect his point of view. Note the use of kalk reactor, which is a simple elegant way to manage the dosage of calcium and alkalinity. He also uses All-For-Reef and a magnesium dosing regimen. The way he puts the fan to blow the heat transfer from the halide fixture to the water, placed parallel to the lines blowing straight under the fixture, is something that I and jda have been suggesting here for more than a decade.
Halides should be the norm throughout the world for the primary source of light over any reef system!
Hope this can enrich this thread and you guys can have fun watching!

 
I normally don't like to watch much these days. I prefer to have some fun and also do maintenance on my tanks at home when I'm done with work. This video was suggested on YouTube and Its a great example to those who want to try halides, specially with SPS.
I don't necessarily agree with some of the thoughts and personal preferences in this video, but it is the best example to see the differences between corals placed under metal halides and under LEDs with the 2 systems connected. Pay attention to the corals under metal halides! Profusely growing and amazing colors!!! We can see the difference in colony formation between the 2 technologies. The majority of corals under the LEDs look distorted and struggling to me. It's so evident! Some of the small colonies under halides are still showing distorted growth and are adapting to the halides, which can take months to say the least. I don't agree with that "advantage of color manipulation" as it would look "better" for some species under different lights. I prefere to offer the best quality light spectrum from halides. Just me. But I respect his point of view. Note the use of kalk reactor, which is a simple elegant way to manage the dosage of calcium and alkalinity. He also uses All-For-Reef and a magnesium dosing regimen. The way he puts the fan to blow the heat transfer from the halide fixture to the water, placed parallel to the lines blowing straight under the fixture, is something that I and jda have been suggesting here for more than a decade.
Halides should be the norm throughout the world for the primary source of light over any reef system!
Hope this can enrich this thread and you guys can have fun watching!


Is that fan big enough, lol?
The difference in look is very noticable with my halide system next to my main led system.
My halide system has the same clear look as this system.
I have some frags in it now and I can compare the 2 systems side by side.
I have not noticed much difference in the way corals grow in my led vs my old halide system but its only been 3 months so.
This growth could be light, flow?
This Colliderscope looks way different than it should. Dont think its the leds because most everyone in the growout runs leds. Just another reefing mystery, lol.
Cant find an Ushio 20K spectral graph but it brings the color all by itself. Halide runs 6 hrs.
9 months growth.
20250823_145241.jpg
20251023_132429.jpg
20260428_114816.jpg

Normal structure from another contestant under leds.
Screenshot_20260520_061936_Chrome.jpg
 
I've never tried the Ushio 20000K yet. All my Ushios were 10000K and 14000K.
Flow indeed plays with the formation of the colonies under any light. The main thing we notice with flow, very evident, is colony growing from side to side, not distorted. Unless the colony was moved and then multiple side to side effects take place.
People tend to think Acros under the sun would grow uniform since they start as a small colony. It's the opposite. They grow fat and spreading to make sure they will sustain the weight of the growth process. Different stages of growth throughout the time it's growing. It utilizes the energy for the fast next robust growth in their genes. We also see some of that under halides.
It all dependes on the species too.
Corals coming from under LEDs will take a while to change in growth and color under halides. Some will take a long time to be what they were.
 
I normally don't like to watch much these days. I prefer to have some fun and also do maintenance on my tanks at home when I'm done with work. This video was suggested on YouTube and Its a great example to those who want to try halides, specially with SPS.
I don't necessarily agree with some of the thoughts and personal preferences in this video, but it is the best example to see the differences between corals placed under metal halides and under LEDs with the 2 systems connected. Pay attention to the corals under metal halides! Profusely growing and amazing colors!!! We can see the difference in colony formation between the 2 technologies. The majority of corals under the LEDs look distorted and struggling to me. It's so evident! Some of the small colonies under halides are still showing distorted growth and are adapting to the halides, which can take months to say the least. I don't agree with that "advantage of color manipulation" as it would look "better" for some species under different lights. I prefere to offer the best quality light spectrum from halides. Just me. But I respect his point of view. Note the use of kalk reactor, which is a simple elegant way to manage the dosage of calcium and alkalinity. He also uses All-For-Reef and a magnesium dosing regimen. The way he puts the fan to blow the heat transfer from the halide fixture to the water, placed parallel to the lines blowing straight under the fixture, is something that I and jda have been suggesting here for more than a decade.
Halides should be the norm throughout the world for the primary source of light over any reef system!
Hope this can enrich this thread and you guys can have fun watching!


He took them off.. this is an old video.


@jackson475
 

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