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bbauman 
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 Topic: LED bulb for MH fixture?
Posted: September 12 2008 at 1:58pm |
I just saw this today. Anyone have any opinions or experience with them?
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Adam Blundell
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Posted: September 12 2008 at 2:04pm |
They are awesome. Let me see if I can find a pic of one running.
However... super pricey. Even when you figure in the cost of ballasts and what not... just so dang pricey for a bulb.
Adam
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bbauman
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Posted: September 12 2008 at 2:13pm |
Adam-
Thanks I knew it'd be you when I saw someone replied. $370 is very pricey. However, the fact that they don't need a ballast is rather impressive. I know some folks who are spending a lot on lighting for ballst, bulbs, reflectors, etc. Probably very close to this price.
I noticed they mentioned 175w mh's in the article about them. Are they comparable to a 175 watt or are these maybe even 400w caliber?
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Adam Blundell
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Posted: September 12 2008 at 3:39pm |
I think I took a pic of them next to halides with the par meter. I just have to find it...
Adam
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Shane H
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Posted: September 12 2008 at 4:27pm |
Very cool. So you just wire it directly to 120 VAC?
You could retro an existing MH setup in about 10 minutes!
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Crazy Tarzan
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Posted: September 12 2008 at 4:34pm |
I'm going to wait for the 12-15k range. Maybe they'll even come down in price by then 
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Was that in there yesterday? Casper--WY windier than ?
Down to a 20, soon to double or nothing
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bbauman
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Posted: September 12 2008 at 6:16pm |
 Shane H wrote:
Very cool. So you just wire it directly to 120 VAC?
You could retro an existing MH setup in about 10 minutes! |
Yup! No need to change anything about your current retro or hood except your bulbs. From the looks of it, they have their own reflector and everything.
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Adam Blundell
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Posted: September 12 2008 at 6:17pm |
Shane- yep!
Nate- I was super pumped on these lights... until I saw the price. You're right, good for the future but for now....
Adam
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CoralDynamics
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Posted: September 14 2008 at 7:36pm |
Hey guys, thanx for the interest in our LED light. I placed a short video out on the sites (and YouTube) to show it off inside the tank. The video on the CoralDynamics.com site is higher resolution than the YouTube version.
Thanks again.
Steve
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Mike Savage
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Posted: September 14 2008 at 8:58pm |
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Adam Blundell
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Posted: September 14 2008 at 9:05pm |
Steve-
Thanks for coming here. By the way, I have $50 I want to spend at your store... tell me what I can buy!
Adam
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chk4tix
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Posted: September 14 2008 at 9:14pm |
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I really like the idea, is there any talk that there will be 14k bulbs?
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Original Crappy Reef Club Member #2
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bbauman
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Posted: September 14 2008 at 9:47pm |
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Steve - good to see you and welcome to the board. Please tell us more - will you be making 14 k or 20 k versions? Have they been a huge success?
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CoralDynamics
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Posted: September 14 2008 at 10:12pm |
Hey all, the interest has really been over whelming! Adam, we sold out of almost everything at MACNA this year (didn't bring anything live back with us!) So hang onto the GC...or use it when you purchase a bulb! :D
We have plans for 14k in the future, but really with just 20w of Normal Output FL Actinic it is almost too blue for my taste! Really! Also when adding blue to the bulb we have to up the wattage, adding wattage adds heat. Heat kills the LED's (shortens life span). Using the Cree LED's we get some of the crispest whites I have ever seen in LED's!
Adam, are you speaking at the ReefStock in October? I may be setting the bulbs up there on a tank...just have to work out some logistical issues.
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chk4tix
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Posted: September 14 2008 at 10:41pm |
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CD, are you looking to make other bulbs that are close to 250w or even 400w?
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Corey Price
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Posted: September 14 2008 at 11:24pm |
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So how about that PAR photo, Adam? This actually looks more promising than the others on the market.
However, I'm a bit comfused:
1. No ballast, okay. How about power supply? LED's work on lower voltage DC power, right?
2. What about all the heat produced from all of those LED's- wouldn't it potentially shorten the LED life?
Edited by Corey Price - September 14 2008 at 11:26pm
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CoralDynamics
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Posted: September 15 2008 at 7:20am |
Chk4Tix- yes we are working toward higher wattage replacements. 
Corey Price- The power supply is located within the bulb housing at the base near the mogul base. This way all you have to do is rewire your LED socket direct to the wall outlet.
The heat produced from the LED's is dissapated through our unique heatsink design. The junction temps are well below manufacturers recommended temps. Also we are using 3w LED's and underdriving them less wattage, less heat, better LED life.
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Adam Blundell
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Posted: September 15 2008 at 8:48am |
Adam, are you speaking at the ReefStock in October? I may be setting the bulbs up there on a tank...just have to work out some logistical issues.
Yes, I will be there! I'll be sure to check out your bulbs, and find something else to buy as well 
Adam
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Corey Price
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Posted: September 15 2008 at 8:50am |
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So what about PAR??? I see the numbers on Coral Dynamic's website, but how does this compare with, say, an XM 10k, or a AB, or an Iwasaki? Could we get some PPFD numbers to collaborate with Sanjay's work on MH bulbs?
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CoralDynamics
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Posted: September 15 2008 at 9:36am |
During MACNA, Chris from Nano-Customs.com was nice enough to loan us his Quantum PAR meter. Our measurments were taken at 14" from the table surface. Sanjay's site lists his readings are done at 18"
Our readings showed 90-95 ppfd at 14" (without water) At Sanjay's site the XM 10k on the M57 ballast (if I am reading the graphs correctly) show a ppfd of 62 at 18" (without water).
Our readings on the same meter with the sensor under 10-11" of water were in the 220-230 ppfd. These are the numbers on our site since we put the light over water for most of the show and it is what most people saw that came by the booth. I am updating the site with the "dry" numbers that will closer correspond to Sanjay's numbers.
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