LED Lighting - PAR

[nottheone]

I read an old advancedaquarist articvle where they measured par values on some different set up. The had a nano with 3 LED's.

Does any one know of any more studies or measurements on par value of LED's. I am thinking that they wont have enough intensity to penetrate the depth of a large tank (like my 180 for example - 24")

Any thoughts or reviews.

If i had a meter to check i would love to experiment. I have found a place that sells LED flood lights supposedly the equivalent 90 watts.

 

[nottheone]

Looks like PFO is ready to do this. sounds cool. I wonder if it will cost under 2000 dollars

http://www.pfolighting.com/Aquarium-LED-Lighting.aspx

 

[jdenton]

They had these at IMAC for pre-order. A 36" was about 1200-1300, 48" was about 1500. Tullio del Aquilla (sp?) gave a talk on LED lighting. His suggestion was to wait about 18 months before going LED. He indicated lots of improvements and cost reductions will be coming very quickly.

He had a model he has built with only 18 LED's that was easily more intense than the 50 LED PFO model.

 

[nottheone]

Thanks for the info. I am initially just going FOWLR. I'm dying to know the specs on the LED's they are going to use.

It will be interesting to see if prices really drop for this trade. I have already noticed in the aquarium/reefkeeping industry they tend to keep prices high since it is "specialized". Metal Halides for example. A slight diffeerence in Kelvin and BAM the price goes from 10 dollars to 90. Tunze water moving equipment and the the new Ecotech (i think thats what its called) are another example.

Since i have an MBA degree I understand these marketing principles but i dont like them,LOL. I guess I'm just jealous I am not the one producing the high margin products!

 

[Ti]

That's AWESOME!
It'll probably shimmer a tank better than halide!
Wonder if it can do clams and SPS.

 

[CSS Reef]

Taggin along! Really interested in low power consumption alternatives with the price of electricity today.

 

[tkeracer619]

<a href=showthread.php?s=&postid=7353568#post7353568 target=_blank>Originally posted</a> by Ti
That's AWESOME!
It'll probably shimmer a tank better than halide!
Wonder if it can do clams and SPS.

Maybe, I'm not convinced of the shimmer. With one or a few LED's the shimmer would be good. With a whole bunch I'm not sure if there will be few enough lights to consider it point source. Sorta like a dot matrix. From more than a couple inches it looks like one light.

I could be completely wrong here.

 

[nottheone]

I can get the 90 watt equivalent screw in flood light for 60 dollars. - 10 dollars for the fixture. I got a response from the seller on these and they are 5mm LED's with 1500 mcds each. Their Kelvin rating was a range of 5000 to 7500 degrees. Supplemented with some 450nm blues would probably give a good color. I may even experiment. I definitely would if i was able to measure the light out put. I could try to be patient and wait for all the specs on the PFO fixture and test results that they will have to release in order to sell it, but I'm not always the most patient. Once they come out with the specs i will possibly look to see what the cost would be to duplicate it - a la DIY style.

I just read an article that suggested 250 e/m2 as a average for tridacnea clams.

I also read that dan riddle did some testing and found that blue led (450nm) brought out coloration in some sps but red led bleached them.

Heres a link to the guy that sells the floods. They are a PAR 38 lamp style (not to be confused with total PAR of only 38). You will notice that it is a diffused lens which is no good in my opinion since we want the shimmy shimmy. To me that would be one step worse than the above mentioned point of single point source as a opposed to a cluster of leds's.

 

[nottheone]

I mean HERE is the link - LOL.

http://www.theledlight.com/index.html

 

[euhero987]

I have red the same kind of article but I am interested on where you have read yours.. can you give me the link if its okay

 

[sirreal63]

Nice job in resurrecting a 5 year old thread.