Are these LEDs intense enough?

plancton

plancton

Active member
Ok, my project has gone down on funds, because it is becoming more of an experimentation for my 6 gal nano. At the begining I wanted seoul semiconductors which deliver 240 lumens.

But now a friend who sells LEDs here in Mexico says he can get me these really cheap:

http://www.vivalux.net/Product_spec/chip_E.pdf

The question is, how intense are these?, I don't wanna have basically moonlights as main light, but these are suppose to be HO, although I can't understand the spec sheet and I wanted you to tell me how good are these vivalux LEDs.

I am planning on using 9-10 LEDs for my 6 gal jbj nano.
 
I did a materials list for a luxeon light bank and found out why the pfo is so expensive. I decided to wait and watch letting others pave the way. I think I would need budgetting ~>$200 for a bare bones 10 light 3amp heat shield mounted led Luxeon array. Can't tell you about what you're looking at though; all the best.
 
I found the same lack of info ~six months ago; for something that seems like such a good way to go there doesn't seem to be much interest yet. For quite some time I sat at super intence led array stop lights wondering why they weren't used in the hobby yet. Now that there is one, I think it a matter of time and the benefits will be seen or it will go away. If I ever get the chance to set up the deepwater nano I'm thinking about it will be diy led for me I believe. Did you look at the Luxeon?
 
<a href=showthread.php?s=&postid=10240908#post10240908 target=_blank>Originally posted</a> by Icefire
not much, 90mcd? lol

look at luxeon k2, 5$/each, 12 should be enought
Click to expand...

The K2 makes like 20 lumens per watt, or 1/5th of what a MH or T5 bulb does. Its a waste of money, a waste of electricity, and a waste of time.


Either buy the Seoul Semis, or wait.
 
Whats 90 mcd? and whats the mcd on the seoul semiconductor?

People is wrong, look directly at the solaris and it will have the same effect on your eyes as looking at MH, look at T5 and it won't be so much.

Look at the results on the SOLARIS: corals open more, H. Magnificas seem to prefer it, that's what I've seen in my LFS.

Perhaps brightness per watt can't explain it, but it does work, and now that the Seoul semiconductors are comming out, it will prove even better.
 
<a href=showthread.php?s=&postid=10248217#post10248217 target=_blank>Originally posted</a> by plancton

People is wrong, look directly at the solaris and it will have the same effect on your eyes as looking at MH, look at T5 and it won't be so much.
Click to expand...


It's a point source of light. I can look directly at one of those 5x1W led flashlights and think i'm gonna go blind. :rolleyes:

Do they have the same effect on a PAR or light meter as they do on your eyes? No. Not even close.
 
<a href=showthread.php?s=&postid=10240949#post10240949 target=_blank>Originally posted</a> by RichConley
The K2 makes like 20 lumens per watt, or 1/5th of what a MH or T5 bulb does. Its a waste of money, a waste of electricity, and a waste of time.


Either buy the Seoul Semis, or wait.
Click to expand...

I consider myself barely a novice when it comes to light, its my understanding that lumens represent intensity similarily as watts does. PAR is a measurement of the portion of light that is usefull for photosynthesis. PFO is a respected manufacture I believe they are claiming that their mix of 25 3w luxeons is equivalent to a 250w mh. according to your logic I would need 1250 watts or >416 3w luxeons leds and that just doesn't seem accurate.
 
Lumens is a measurement closer to yeilding a better understanding of how much actual useable light is emitted than bulb Wattage is (it is actually a measurement of visible light emission). Given, it is not as good of a measurement as PAR for our purposes, but you won't find such specs from any bulb manufacturer because it is relative to where you measure it from. As there is no real standard for where and under what conditions one measures PAR, it is not a measurement that you will see printed on a spec sheet. The reason why LEDs can compete with such low base efficiency is that their incident light is rather narrow and therefore more dense. MHs and T5s on the other hand cast light pretty much in all directions in space, so although they are more efficient in total light emitted per Watt, that efficiency does not directly translate to light placed into the tank. Reflectors greatly increase that efficiency, but not as much as with LEDs.
 
Not entirely sure how relevant this is, but I'm working up an array of royal blue Luxeon IIIs to supplement a 250W 10k Ushio DE on a 65 gal. They make for some awesome fluorescence in corals.

Right now I'm planning on 12 driven by 4power pucks on 12V power supplies. I'm thinking of some sort of modular design inside PVC pipe that would allow for me to swap out and redirect LEDs and put CPU fans in the end to blow cooling air through pipe across individual heat sinks. If its too blue I may swap some out with white K2s or Rebels once they become a bit more user friendly.

I'm also hoping to mount PFO mini pendant in the middle of them on ceramic corner tiles to diffuse heat. This way I can pipe all wires out one side and contain with some of that split tubing to pretty it up.

I've tried out a few different optics too, probably go with the low profile vs. the fraen because of price and fixture logistics.

I ordered from www.luxeonstar.com for most of the parts I've accumulated so far.

-Tim
 
I just read in a magazine that china is on the fore front of LED technology. I just
bought a bulk of super bright 140,000 mcd white leds and 80,000 mcd direct from
the manufacture for half the price of what people are paying for the luxeons.

Even though LEDs cant be measured in watts. Im guessing at 140,000 mcds, they
have to be equal to atleast 2 to 3 watts of light each.

I think LEDs are going to be the standard in reef lighting 5 years from now. They
use only a 1/10 of the power that MH's would and when used right they produce
awesome results.

richconley obviously you havent done your research and you want to talk about
waste of electricity.....metal halide!!! With a solaris LED system..your power usage
would not even be a quarter as it is using metal halide.
 
Energy efficiency-wise, metal halides are amoung the best light sources available (up to 120 lumens per Watt). The only thing currently better is High Pressure Sodium, which gets into 140 lumens per Watt, but the spectrum you get out of them is not great for our purposes. LEDs have a way to go before besting that, but they may at some point in the near future.
 
<a href=showthread.php?s=&postid=10249094#post10249094 target=_blank>Originally posted</a> by mr.maroonsalty
I consider myself barely a novice when it comes to light, its my understanding that lumens represent intensity similarily as watts does. PAR is a measurement of the portion of light that is usefull for photosynthesis. PFO is a respected manufacture I believe they are claiming that their mix of 25 3w luxeons is equivalent to a 250w mh. according to your logic I would need 1250 watts or >416 3w luxeons leds and that just doesn't seem accurate.
Click to expand...

THey are claiming that, and that claim has been thoroughly refuted. Its absolute crap.

The LEDS theyre using are about 1/5th the efficiency of MHs and T5s. IE, you get 1/5th the light for the same energy.
 
I'm having problems understanding a blanket statement like that; a 400w mh doesn't produce 3/8 more useful light as a 250 w mh, so making a 1/5 generalization seems inconsistent (no offense) . A 3,000,000 candle power spotlight makes a lot of light, but if its put over a coral its par may be near zero and have less usefulness than an even 1/2 watt of the correct spectrum. Its been six months since I even searched for solaris info here I'm sure the amount of threads about it has multiplied seeing there was very little at the beginning of this year.
 
I assume you have seen Dana Riddles AA review claiming better PUR from the 75 w solaris array than a 250 w xm 20K (maybe not the best choice for comparison, yet valid enough)
 
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