Episode #4. Light intensity & photoperiod relationship | Red Sea Insights
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- Опубліковано 5 лют 2025
- Red Sea Insights™, a myth-busting video series that illuminates everything you always wanted to know about reefkeeping.
Watch episode # 4 of the Reef Light series on Red Sea Insights to learn about light versus dark periods and the relationship between spectrum, intensity, and photoperiod.
Watch our other Red Sea Insights episodes dedicated to reef lighting to tap into this exciting topic and to the insights incorporated into our new ReefLED lighting.
You are here:
Episode #4, Light vs. dark period: (bit.ly/2L8snuW)
Click to watch the previous three episodes:
Episode # 3: Busting PAR reading myths:
bit.ly/2L114Tv
Episode # 2: Reef-Safe lighting:
bit.ly/2XqFJta
Episode # 1: The role of lighting:
bit.ly/2IttZOr
More links:
The official product page and video of ReefLED lighting: www.redseafish...
FAQs, in-depth technical details & specifications:
www.redseafish...
Facebook group:
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Facebook page:
/ red.sea.ltd
More videos designed to empower you with knowledge are in the making.
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Very professional!👍
Thank you! 👍
Is it possible to improve the color of SPS ?
Kol Hakavod Aviad. Very useful series. Thanks and keep them coming.
That's just the beginning. We have more to come.
Love it, it’s really plug and play. Will be getting the 170 Max E series as soon I’m done with research
Cool, thanks.
Make sure you join our FB community and share your story.
facebook.com/groups/817257271620591/
The differences among PAR, PUR and spectrum are clear now. Could you give me an insight about Kelvin specifications at most T5 bulbs?
That's a different topic. Since most T5 are fading away now the relevance of that topic is a bit lower, but we will consider it for future episode if it gets brought up a lot.
We need more of these type of videos
What would you like us to focus in next?
Thanks for commenting.
Red Sea how to vids... so il give you a list haha
How to fine tune your skimmers difference between wet/dry skim etc
How to use no pox so you get the best from it
How to determine dosage for reef foundation how much to dose
Tips of being successfull at keeping lps/sps in depth
Why your salts are different from the rest and how to determine which one you should get.. bluebucket or reef pro salt
How to get the best out of your red sea reefer tanks... tips on fine tuning over flow plumbing them correctly as ive seen so many people plumbing them wrong maintenence of the tanks like how often to clean the combs or over flows sump pipes etc
@@MereReef Go for it, we do want to hear so we can fine tune our efforts to bring you relevant content.
cheers RedSea !, keep up with the "Insight" series
Thanks, let us know what else you would love us to cover and if you have any questions regarding lighting.
If an aquarium has been running for 2 months with a preset photoperiod of 12 hours, would there be no algal blooms?
No animals or corals have been added yet. What do you recommend doing?
There can be, this is why using NOPOX and testing NO3 and PO4 is important. Controlling the nutrients will prevent the blooms and make the aquarium ready for corals.
Very nice series!
Thank you.
Did you test if varying the intensity of the light throughout the day (in saw like pattern) prevents photoinhibition?
Yes. At the end of the day, there's a max capacity of irradiance the coral can take, per photoperiod. You can play with the intensity and time to extend or shorten the photoperiod (given that you're in the right PUR spectrum). When one goes up the other must come down. It's the sum that matters (you can work around an average number and go above and then below for equal amounts of time). Allow a period of complete darkness as well is super important.
Hope that answers.
Great information.
Thank you for this! I have to go now - gotta make some changes to my photoperiod....👍🏻👍🏻
That's the best comment we hoped for. Glad we could shed light on it :)
Hahaha, I see what you did there....😆
dear red sea i am maturing my nano max 75 liters i ask how should i put the percentage of color s and its total intensity of the hd prime lamp and also how many grams of your coal should i put in a max nano 75 liters thanks
Please reach out to our tech support in that matter, or ask on our FB group for fellow reefers to share their schedule.
facebook.com/groups/817257271620591
I have the reefer 525xl tank with some softies and lps. Im using 3 led90s. What intensity % do you recommend for the blue and white light?
You can use the pre-program from the original library and if it's too intense use the acclimation mode.
Hello! Wanted to ask when the Reef led 50 will be released? Because need your new lighting as fast as I can lay my hands on it!
Within a couple of weeks they will start arriving to the different markets.
Red Sea Great!
Red Sea But, I want to ask if I can buy from you? I really need lights as possible, because my lights started glitching and I have SPS dominant nano
@@moorrum6686 Any Red Sea Dealer can assist you with that. Find one here:
www.redseafish.com/shop-locator/
I like my tanks in bright light much white, i got 2 led lights pipe and i bought reefled90 but if i Only use reef90s i find it to be quit dark in my tank and very blue even if i set down the blue and increse the white its stil pretty dark i allmost perfer original t5 lights or ledpipes cause i really like high daylight white for my tanks
Same I added t5 and day light led bar
What if i'd like to have the lights on until 9pm. So i should start the lights from 9am right? But my tank is outside the house and can get indirect lights starting at 6am. What is your recomendation? Coz my only time is during 6pm onwards at home after office.
Hi, ideally the photoperiod would be equal to the dark period. Set your LED to come on as early as you can. If you're home between 6-9pm, you can set it to 10am-9pm (standard setting), perhaps consider to cancel the moonlight.
With my previous led lights, the white color detonate more than the blues (and I like it).. when I started with the Red Sea 90s, my lights are in 65% blue and 55% white and both percentages I decreased by 5% because start to bleach some acros (I considering the length between water surface and the coral). I read the PUR-PAR% table.
But my question is.. Can I have the same PUR/PAR % if I want to have more white than blue color?
This is great news I can have my lights on for 12hrs. I was always told no more then 8 hrs for my light cycle. You mentioned a moon light period is that already installed in Red Sea's lights? Where do you buy Red Sea lights from?
Mary, with many lights it's not as straight forward as it seems and the recommendation you got my still be valid, as different lights produce different outputs and your user setting might add too much of the unutilized spectrum to cause heat damage on top of not getting enough PUR or getting too much of it in a shorter period. You can purchase the ReefLED at any Red Sea Dealer. To find the one closest to you visit our shop locator on our website:
www.redseafish.com/shop-locator/
I have a question which no one seems to be able to answer. A lot of LED lights and bulk reef supply say that the WIDER blue spectrum is needed for best coral growth and colour. The fixtures you have tend to have a narrower peak. What im asking is based on your research is the wider blue spectrum needed better
We have over 30 years of coral growth research and we looked into every aspect of the animal's life. The spectrum we are using in the Reef Spec blue is ideal for what the coras-zoox complex (it's not "just zoox" alone or just coral alone) needs for optimal growth and wellbeing. Since energy doesn't get lost everything outside that PUR range will turn into heat and a damage potential.
Red Sea thank you... so even though the blue part of the spectrum is not as wide as other led fixtures in the market you would say in your research this is the BEST spectrum and was created intentionally? Im thinking of switching to the red sea lights but wasnt sure about the spectrum etc
@@Redseafish I think he spoke about the spectrum that is narrow in the pur range,you can have a larger still stay in the pur ,for example some lights have a larger blue same kessil ,why you choose a narrow blue instead of large?
Hi , is it possible to put these lights under a hood , ie sitting on the glass .
witch are the configuration of the reefled int reefbeat in your back aquarium , can you share it?
Thanks
Thanks a lot ! veryr very much !
Hi the default 20K settings. They are designed to be set and forget.
@@Redseafish Thanks , i have a red sea aquarium and reef led 90, i going to prove the 20K Setting, my corals it's going down . Now i have 23K setting. I going to go up very slowly until arrive a 20K setting .
Thanks for your support and tips.
I will say something about the change how will affect to my reef .
Thanks
Aviad, I recently purchased the RedSea Deluxe 350 with AI Hydra 26 lights. Is there a range of settings I should be using with these lights to make sure I am staying inside the Reef-Spec parameters?
First of all lose the reds and greens, up the UV, V, RY, B to the max and set the white between 0-50%.
You might have to play with the intensity\acclimation if it's too high and causing photoinhibition.
@@Redseafish hmm. That sounds scary. I have all the blue spectrum lights at 45% and a PAR meter I rented still reads 50 on the bottom of the tank with the lights 11 inches above the water. I started a couple of cheap sps corals after the tank had been up 4 months using AI's recommended settings and both frags bleached and died within 2 weeks. These lights are powerful!
@@hbforeman That's why there's an acclimation mode. Use it to reduce the intensity and gradually work its way up to allow the corals to get used to the light. give it a good 60 days. and watch for the signs of photoinhibition.
@@hbforeman Join our FB community with over 31K members. You can get great tips from us as well as other experienced reefers:
facebook.com/groups/817257271620591/
curious thought and hope you are able to provide some insight:
1) is the UV light of 360 - 400 nm given off by Red Sea reef led harmful to human?
2) are the blue lights given off by Red Sea reef led harmful to human eyes or are blue lights harmful in general? there is some information out there describing blue lights to be capable of causing permanent damage to human eyes leading to blindness.
The ReefLED has been tested and certified RG1 (Low Risk) according to the European safety standard EN 62471:2008 which tests the photobiological safety of LED luminaires.
The lens of the ReefLED has been recessed into the body of the unit specifically to limit the residual light and glare from the unit.
Some common sense should be exercised when using ANY reef lights as they all have predominantly blue light and looking directly at any intense light source should be avoided.
Can you give us a sample of Reef Spec settings ?
Of course, check it out here:
www.redseafish.com/hardware/reefled/
עבודה מעולה אביעד.!! תחום התאורה מאוד מבלבל בעיקר בלדים תודה רבה שהגדרתם תוכניות מובנות ככה שגם החובב הממוצע והמתחיל לא יוכל לפגוע באלמוגים.
תמשיכו בכיוון הזה ואחלה סירטוני הסברה.!!
Excellent job Aviad. !! The field of lighting is very confusing especially in the LED, thank you very much for setting the built-in programs so that the average amateur and beginner will not be able to hit corals.
Keep going in this direction, and excellent informative videos at eye level!
Glad you liked it. If you have any ideas you would like to hear more about feel free to comment below.
Hi guys ... am.i right in saying that there's a.difference of 3 inches in reach between the 3 sizes of this mounting arms
What blue and white percentage do you recommend running the led90 at for a softie/LPS/anemone tank? 44gal.
Start with 100B and use acclimation (or reduce intensity) if it's too strong. As for the white channel use as much as makes the tank look nice to you. It doesn't really matter to the corals.
How long until BRS does the “How to mimic the Radion AB+ settings on the Red Sea LED?”
Maybe the other way around ;)
According to Echotechmarine, "The SPS AB+ program has a photo period of 7
hours for the core spectrum with a one hour ramp up and ramp down (9 hour total photoperiod). In a non-commercial setup where viewing is a priority - these ramp periods would be the optimal time to experiment with a desirable viewing spectrum." If the Red Sea recommendation is correct, then you may need to manipulate the intensity to account for the shorter photoperiod. The link to the CoralLab study is ecotechmarine.com/wp-content/uploads/2016/07/ReefWholesale_CoralLab.pdf. There's a link on page 5 to download their schedule for Radions.
I replace total darkness with 1% moonlight. Will it affect coral health?
Yes it’s uv light I wouldn’t do that
@@CoralReefkid is 1% uv harsh ?
@@Apple-qf2fj depends, but they limit you to 12 hours on the app for a reason
How much cover can one light provide? Would it be enough for a 20 gallon tank?
This will depend on whether you choose a ReefLED 50 or 90. Please can we recommend to visit our website at the following link for further information, www.redseafish.com/hardware/reefled/
I don't know which is the exactly the intensitive the spectrum of light. i have a redsea 300 XL, but it difficult to know the kind of light or quantity of light i need , i put 100 % blue , but de white light is difficult. i had 100% white light over 6 hour, but some coral has been death. Now have 50 % whit 6 hour less intensity. Some tips for me , to my reef ?
Yhanks a lot
If it was at the right high then the corals not die because of the lights
@@tomg5405 thanks for your comment.
I work a night time schedule. I like to turn my lights on at 1400 and off at 0200. Should I concerned about the natural indirect sunlight in the day?
yes, as the light coming from the outside is still being detected by the animals. While it may be enough to not interfere with the discharge of the zoox's photosystem, the circadian clock and hormonal regulatory systems will still be affected. How exactly and the severity, that's worth many years of research to get to a conclusion. So unfortunately other than a "yes, but" we cannot give you a definitive and conclusive answer. Similar to the effect of you living upside down with the clock ;)
Anyone try to combine Red Sea 90w LEDs with Aquatic Life Hybrid T5, can they be mounted properly?
if i lower the intensity , can i longer the photoperiod ?
i have reefled 90 , softies / LPS dominant as i plan.
my tank still in cycling process.. 90 x 60 x 50 cm..
whats your recomendation profile for this ? 50% blue ?
i dont have par meter over here.
You can, however without a way to measure it, we would recommend not to exceed the time on the preset. As for each hour of light you need an hour of complete darkness to allow the photo-system to discharge. The profile is up to you and what your eye likes. Join our Facebook group to be able to get a tailored answer from other hobbyists as well as add pictures and videos for more comprehensive answer to suit your needs.
facebook.com/groups/817257271620591
It’s clear you only want to sell your new light. Corals aren’t finicky creature in regard to lighting. I have used several settings of my Sanrise LED and corals were vibrant and colorful despite the settings. They can adjust to lighting by increasing/decreasing their zooxantelae unless lighting is awful.
What is important to corals is *stability*.
While corals can live in various conditions, we strive to give the the ideal conditions. You can give them the "wrong" (or a bit off) conditions, HOWEVER they will spend a lot of energy trying to correct it. It goes for Calcium\KH\Mg as well as salinity and spectrum. At the end of the day, we try to minimize the energetic demand by the corals. The coral biology hasn't changed much over millions of years. The more we research the more we can give these amazing creatures exactly what they need.
If you can provide your coals with the ideal conditions that conserve the most energy, that extra energy will be funneled towards growth and coloration, improve their response to stress etc.
So it's not all about selling a light fixture, but providing the complete solution (water parameters, circulation, light) for corals to thrive in.
Ugh, I think you never kept acros then
What happen don't has say anything about it
Kind regards .
Damn I wish Aqua Illumiation did this 🤷♂️🤦♂️
This concept ignores the presence of the accessory pigment peridinin that absorbs light up to about 550nm.
We actually talked about it on episode #3. You're right, however the % of Peridinin out of the whole photosystem (acpPC) is about 15% and though the max excitation is at 502/526nm, we have found that it starts even at 490nm (which is at the slope of the peak of the RS reef spec blue) which gives you enough to excitate the entire complex efficiently.
One more thing you need to remember is that the the zoox is embedded in the coral's tissue. Energy cannot be lost, it transforms. Any unutilized energy, is absorbed and transforms into heat, can create free radicals, and damage the coral's tissue. The red wavelength will get absorbed by the tissue before it can reach to the zoox causing more harm than good.
@@Redseafish Fascinating. I'm not sure if you guys have done this, but are there whitepapers done by Redsea from the results of your research? I guess proprietary info don't need to be revealed, but conceptually your research results will be very useful for consumers and improve the whole industry as a whole.
@@jeffyen That data is proprietary and as such we will not share it, however, We shared and will keep sharing our knowledge and conclusions in blogs, videos and on our Facebook group.
facebook.com/groups/817257271620591
@@Redseafish we need more such informations