Anyone Thinking of Dumping LEDS and going back to Halides

jda said:
They typical MH user won't switch because they generally have more experience, know what they are looking at and have yet to ever see a tank under LED that would not look better under MH. Anybody who say that an SPS tank looks just as good, or better, under LED than it does under MH lacks the breath and depth of experience to know better. Period. If other things are a factor, like heat, dimming, thunderstorms, etc., then cool, but nobody who know should/would ever say that they make the coral look better.

I was around when T5 came about and the only argument that ever was a huge factor was with cheap Odyssea, or the like, fixtures... or that there was no T5 substitute for Super Actinic VHO... or that they lacked 6' lengths and that 2 36" bulbs were twice as much as 1 72" bulb. I think that it was pretty evident early on that a quality T5 bulb on a workhorse ballast was pretty awesome. Nobody ever doubted that you could have an awesome SPS tank with T12s and T5s were and easy step for most. If you are thinking about PCs, then that debate did happen, but PCs did really turn out to be turds.
Click to expand...
I was a successful MH user that now uses LED. Your first paragraph is an extremely biased opinion. Some how MH became and arbitrary standard to some. If it does not look like a MH lit tank it is called bad, when in reality it is just different.
 
Anyone watch the latest david Attenborough special? There is a segment where a group of researchers are growing and spawning coral indoors. With ocean water. And LEDs. Hydras :)

If you haven't seen it check it out. Amazing documentary.
 
oreo57 said:
Yep much appreciated.. BTW: I've found this a fairly useful tool for a number of things.. Mostly rough estimates;Worked up a guesstimate of the 2 spectrums. Ignored R and G since you barely added anything and the ratio of white to blue was 1:1 Purple was 1/10. (100/100/20)
charts show est. mH's ect..

mh1.jpg


http://spectra.1023world.net/

Play w/ it a bit w/ your own numbers..

Oddly the W ratio between the 2 is about the same... ;) Well yours is .73 Mine .82. (never mind, that is by area I believe)
Used 2 250W 14000k Ushio MH..
Couldn't tell what blues you used so just used CREE RB for the led's. And CREE neutral white..Semi LED 390-40o (opps, probably should shift that to 400-410..shifts the purple to the right and makes it better..score of 73)
Click to expand...

Nice tool! How do you pick different color of LED? They're just identified by name brand?
 
karimwassef said:
Nice tool! How do you pick different color of LED? They're just identified by name brand?
Click to expand...

Click the items menu and add companies.
Expand the company menu to add colors/series types.
Raw diodes, fixtures,sunlight at various places ect..

Once you start playing w/ it it gets simple.

Once you generate a graph, click on it and it changes to different ways to view it, spectrum CRI, K.. ect

http://spectra.1023world.net/

You can adjust beam angle distance and use (fw,SW) ect..
 
lpsouth1978 said:
Sorry, the color ratio is:

32 royal blue (originally 62, but 30 are not working in each 1/3rd)
30 Neutral white
18 Green
12 red
18 blue
12 uv

This is per 1/3rd of the tank.
Click to expand...

Made a chart w/ the above pattern. Tripled the CREE's due to them being listed at 1W
PAR estimate shows it probably was not the best plan.. ;)

CRI is 21 :eek:
K is off the baseline...

Did XP-e because it had all the color groups.. As I said only estimates..


mh3.jpg
 
Last edited:
How are you producing light below 390nm on this graph? What brand of emitter is giving you <400nm leds, on the chart, and are you using them?
 
Damn you. I really liked the way that chart looked and I got excited. Now Im back here in reality, and it's all your fault =P

Thanks for this chart thingy...Ive been using photoshop and integrals to calculate this stuff, now I can do it much easier!
 
Aqualund said:
How are you producing light below 390nm on this graph? What brand of emitter is giving you <400nm leds, on the chart, and are you using them?
Click to expand...
They have "generic" LED's at 390..

And
SemiLED 390-400,, 400-410 ect.
True UV below 390 (say true UV) is not really considered and the argument as to if it is good for the "health" of corals is a .. well argument.
Certainly isn't good for ones own eyes..

LED's are not "strictly" spectral points.. range of wavelengths (albeit narrow) is contained in them...

Punching UV to create "sunburn" pigments is somewhat counter productive..opinion..
 
Aqualund said:
Damn you. I really liked the way that chart looked and I got excited. Now Im back here in reality, and it's all your fault =P

Thanks for this chart thingy...Ive been using photoshop and integrals to calculate this stuff, now I can do it much easier!
Click to expand...

your welcome..
And sorry..
Heat signature should have told me right away (>700nm)
I was going to delete/correct but thought it was interesting..

BTW: I always assume length = depth.. not sure though..
 
oreo57 said:
They have "generic" LED's at 390..

And
SemiLED 390-400,, 400-410 ect.
True UV below 390 (say true UV) is not really considered and the argument as to if it is good for the "health" of corals is a .. well argument.
Certainly isn't good for ones own eyes..

LED's are not "strictly" spectral points.. range of wavelengths (albeit narrow) is contained in them...

Punching UV to create "sunburn" pigments is somewhat counter productive..opinion..
Click to expand...


Yes, all definitely debatable. In my personal quest to match sps coloration, shading, and growth of MH, I have not yet found an equitable solution with LEDS, but with led/mh or led/t5 combos....and so far it's pointing to either lack of spectral variety, or lack of spectral regions. Much work to do yet :)
 
LEDs are a great technology, it's just to bad the "light" they emit looks terrible.:hmm6::bounce1::fish1:
 
Aqualund said:
Yes, all definitely debatable. In my personal quest to match sps coloration, shading, and growth of MH, I have not yet found an equitable solution with LEDS, but with led/mh or led/t5 combos....and so far it's pointing to either lack of spectral variety, or lack of spectral regions. Much work to do yet :)
Click to expand...
IF they ever produce large watt violet based stable emitters you won't need to stress so much:
daylight-high-cri.png


http://www.yujiintl.com/tm-30-15-high-fidelity-full-color-gamut-led-lighting

If people don't like this color, they don't like sunlight.. ;)

Just add 420-430 blue... to taste..
 
oreo57 said:
If people don't like this color, they don't like sunlight.. ;)

Just add 420-430 blue... to taste..
Click to expand...

i think most people convince themselves that they like LEDs....probably the same people that convince themselves they like broccoli over brownies!!!!

all the charts, graphs and degrees in the world are not going to change the fact that corals look and grow better with MH/t5s!!!!!
 
CHSUB said:
i think most people convince themselves that they like LEDs....probably the same people that convince themselves they like broccoli over brownies!!!!

all the charts, graphs and degrees in the world are not going to change the fact that corals look and grow better with MH/t5s!!!!!
Click to expand...


What is so special about MH/T5 photons??

answer: Nothing..
 
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