LIVE: The Quality of Light & Why This Might Be the Most Important Part of Reef Tank Lighting.
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- เผยแพร่เมื่อ 24 ม.ค. 2023
- Today, we're talking about PUR and the quality of reef tank light LIVE! Last week, Ryan and Jason dove into positioning and mounting height over our saltwater tanks. This week, we're going all in on PUR and the quality of light for our coral. There's a difference between usable spectrum our coral use and spectrums that make them visible and you can learn all about it right here!
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Great talk guys. The more hobbyists understand this the more manufacturers will make better lights.
Great step forward. I would seriously suggest you also look at the spectrum of metal halides as possibly the best SPS growing lights and they might also help to solve the red peak dilemma.
Thank you for the education.
Because i studied the science of why my Actinic bulbs worked so well in the late 1980's, knew this since then and became a marine biologist. Great video!
Mind blown! - Back when I got back into the hobby, a friend gave me a kessil A360w to start a nano tank. Just about a year in, with fish, a pair of anenome's etc etc I switched over to a REDLED 50W. I preferred the form factor and app plus the shimmer of the kessil was "to much" at the time. Long story short, that tank no matter what I did never really recovered after the light acclimation, slow setting changes, etc, etc. This new information makes sense to me now and answers what I already knew: it wasn't the light swap, in itself, but the spectrum of the new light that shocked the animals. So much so that I lost most of them in that tank except the clowns.
food for thought.
I’ve just paused it - at 9:45 - is this the same as Gallon per hour ? Everyone going for the Billy idol effect, more, more more ! !
So glad to hear theories of red coming through to hobbyist level. It’s been years since the supercharge growth with photosynthesis videos aired which is where I first hoped you would explore red. Excellent use to inform manufacturing and aquarists. Thank you
Chiming in, I've personally seen immediate improvements (within 2 weeks) in coral health tuning down red. This was at the direction of a friend who noticed the same. Given the limited number of red spectrum leds in the fixture it would anecdotally suggest it's easy to over do.
I later read a paper showing similar results though there were other factors to be isolated.
@@Slide-Loc I always figured the shallower corals would benefit more from red spectrum than your deeper water ones, as the red light doesn't really penetrate deep enough for the deeper water corals to get much at all. This would mean that many sps corals would benefit more from red than your average hammer or something. This all being said, I have noticed it's definitely easy to overdo reds and (and greens) in tanks, hence why I hear so many people just turning them off because someone told them to. I've always noticed a benefit to SOME red. I'm curious if you noticed which corals benefitted the most from less red and which ones didn't notice much. Also if you're using one of those chinese boxes or something like a Radion or AI would also be neat to know.
Great job.
Ryan once described "flow" as a three legged stool in a much earlier coral video. And that's true here as well. If I asked which is "best": PAR, spectrum, or spread? For much of the last decade, hobbyist would have screamed PAR.
The more complete answer is, proper lighting is another three legged stool. Except, the leg covering spread was largely forgotten with T5's and seems finally rediscovered. And the leg covering spectrum seems to have only been understood by a few of us; most of which understood one formal field of biology or another.
It's nice to see all three concepts being discussed and more importantly, having their relevance be clearly explained. Something many who've read the underlying science often fail at.
You are unlocking the missing pieces I couldn't quite put together all these years. Time to break back out my spectrometer and par meter.
Tune the spectrum and hit the par, though I'm betting you don't need the par we're use to quoting if the spectrum is correct.
Very interesting video thank you.
Want to know about UV talk to ACI Aquaculture. He has some pretty compelling thoughts on it and why he went back to metal halides.
Yet another incredibly informative session. I have learned so much from BRS, I cannot thank you enough for these posts. Was looking for a PUR comparsion chart for various lights on the market and pretty much all I found were scattered threads on PAR, so definitely a subject which needs more attention. Like others, I wholly embrace the idea of a standard on PUR. Now, where did I put my Skittles . . .
Let's add something actionable to the PUR conversation and pick up some skittles along the way :)
I support this standard
time for progress :)
@@BRStv Yes but you REALLY should get an actual scientist on (may be a little hard to find a marine scientist where you are though ;)
@@sunnygoold9449 Spectrum is an area where I am 100% confident that there will never be a solution that is scientifically proven and peer-reviewed to be the best approach. Even if there was one it would only apply to the corals in the experiment and it likely wouldn't factor in that we want the corals to look visually powerful as well. However, I am 100% confident that we can come to a consensus on a spectrum zone that produces consistent easy-to-produce results for anyone who uses it and just happens to look awesome as well. What we have right now is the wild wild west where anything goes :)
@@BRStv Not PUR relative native depth and sunlight conditions?
@@JeffreyBenjaminWhite too complex I think - we need just one measure otherwise its different for corals from different depths - like Aussie 24ks are found in shallow water with a lot of particulates - They could do it in bands based on depth but how do yo know which band a coral fits in? I think 1 band for 95% of corals we keep works.
Hey Ryan, would love to see an update on the 360 with all those WWC frags you threw in! I bet it’s looking great.
it would be expensive, but you could run an experiment like in the past with several tanks. All the tanks with the same set of coral frags, all tanks at different blue light wavelengths and measure the growth after a couple of months.
Do you guys plan on continuing to post podcasts on places like Apple Podcasts? I’ve consumed everything from 2019-2022 and I love listening to them while I’m driving.
Push the limits! :D
Very exciting. Color is everything. I separated color for a living for forty years in hi-res scanning photography. You could invite more peoples attentional understanding if you reverse the colors. Deep purple blue is the opposite of pure Yellow. An easier way to grasp energy output would be to image sun output. Lots of Yellow. You don’t want Magenta light, except to make some of those Yellow rays Golden. So not much green. You don’t want Cyan light, well maybe a little, so let’s color the sky Cyan blueish. Ok, we’ll add some red. But let the sun shine in. Yellow. Standardize the opposite colors to show where the energy for Corals comes from. 😅
Cyan, Magenta,and Yellow, are the true measures of Rays that make up the photo synthesis process for corals, and makes much more sense for us to 👀
I believe the reds and greens or (cyans and magentas) tell the corals what kind of a day is ahead. Take all the light color graphs and invert the colors to CMY in photoshop.
Good to hear BRS’ Ryan echo Quanta Reef’s Luca’s call for a light testing standard, but let’s elevate the BRS’ offering a bit.
1. Use the Biology Band as a visual, but ditch the Ryan interpretations. Your spectrometer quantifies PUR in mW/m^2. Add the mW/m^2 from 410-484nm. Share that value.
2. Measure 24” from light face to the spectrometer sensor.
3. Continue using all channels at 100% for this measurement.
4. Share price/PUR along with price/PAR.
5. Share sub-400nm UV data. Because we don’t have studies to support the value, that doesn’t make the data irrelevant.
6. The UPRtek MK350S Premium has limited UV measurement capabilities. Get a Hopoocolor. Several of us have one and several of us have compared our spectrometers’ data to ensure accuracy. Join the party. It’s only $650.
Lol you don't know what you're talking about. Adding light in a band isn't PUR.
Anyone know of videos like this for freshwater/plants?
Red Sea’s ReefLED series with their “Reef-Spec” technology has mentioned this PUR concept on their website. However, their lights (ReefLED 160S, 90) don’t rate high in your tests.
Okay and what light is this?