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View Full Version : 250w Radium/ 48 LED Array Comparison Shots


DFason
01/18/2011, 11:33 PM
This is a custom 48 LED array I have been working on to match the output of a 400w Radium and color.

4.25x4.25" Square with 22 NW Rebels, 2 Blue, 24 RB.

Board
http://i20.photobucket.com/albums/b222/drnugz27/Reef%20Treasures/LEDBoard.jpg

20K Radium
http://i20.photobucket.com/albums/b222/drnugz27/Reef%20Treasures/WarPeaceFavia11511.jpg
http://i20.photobucket.com/albums/b222/drnugz27/Reef%20Treasures/RainbowLord11511.jpg
RB Blue Only
http://i20.photobucket.com/albums/b222/drnugz27/Reef%20Treasures/WarPeaceFaviaBlueLED11511.jpg
All 48 Rebels
http://i20.photobucket.com/albums/b222/drnugz27/Reef%20Treasures/WarPeaceFaviaLED11511.jpg
http://i20.photobucket.com/albums/b222/drnugz27/Reef%20Treasures/RainbowLordLED11511.jpg

I still need to do some spectra graphs and PAR readings but so far so good :) I think the colors speak for themselves.

-Dave

Nuka_Cola
01/19/2011, 12:14 AM
Very nice, following along :D

Marineaddiction
01/19/2011, 12:36 AM
Tagging as well

DFason
01/19/2011, 09:24 AM
I'll have the PAR meter today so I hope to get some stuff measured. Imagine this possibly in a reflector?

-Dave

nauticac4
01/19/2011, 10:47 AM
LEDs are fairly directional. A reflector shouldnt do much if anyhting to help with the lighting of the tank. Might make it look cool.

PoggiPJ
01/25/2011, 10:17 PM
Hi Dave, thank you for posting those pics. Can you be a little more specific on the captions? There are a couple of pics between the captions, so I'm not sure what I'm looking at.

nauticac4
01/26/2011, 08:53 AM
Where can I pick up one of those arrays?

Stupes
02/01/2011, 11:21 AM
Thats not really a fair comparison. Your comparing a lamp without actinic supplements, to a custom built fixture with lots of actinic lighting. How about not using the RB's, and only use the whites and 2 blue you have, that would give you a more balanced comparison.

DFason
02/09/2011, 06:49 AM
Stupes - Why would I do that? Most people consider the 20K Radium bulb to be one of the best bulbs for color and growth. If I just ran NW it would be like a 6500K bulb. It has the same PAR readings as a 400w. I am just finishing up the spectra graph for this set up to see how it compares to that too.

-Dave

Emoney
02/09/2011, 08:49 AM
love the way LED's make colors POP! thanks for sharing

Stupes
02/23/2011, 10:43 PM
Radiums are a full spectrum lamp with a blue peak. The Radiums blue peak is not the same spectrum as the blue in the RB's. So it will not have the flourescence that your fixture has. Basically you built a lower K fixture with alot of actinic supplements, that your trying to compare to a full spectrum lamp. Im not trying to take anything away from your build, it is nice and clean. Also I am very interested in seeing your spectra graph, and how you tested for the spectra graph.

tinkerman
02/23/2011, 10:50 PM
What reflecters are you using with the radium? I am interested in par readings.

wfournier
02/24/2011, 07:43 AM
Radiums are a full spectrum lamp with a blue peak. The Radiums blue peak is not the same spectrum as the blue in the RB's. So it will not have the flourescence that your fixture has. Basically you built a lower K fixture with alot of actinic supplements, that your trying to compare to a full spectrum lamp. Im not trying to take anything away from your build, it is nice and clean. Also I am very interested in seeing your spectra graph, and how you tested for the spectra graph.

Actually depending on what BIN of Royal blues you get they are. Radiums peak right around 450nm and there are royal blues available in a 450nm BIN.

BeanAnimal
02/24/2011, 07:57 AM
It is important to remember that photos of tanks, while being nice to look at, are not useful tools to compare the color rendering of bulbs. What your eyes see and what the rest of us are seeing on our computer monitors are not the same, or even close for that matter. There are far to many variables involved between what you see and what is displayed on screen.

If you reach up and press the "color temperature" button on your monitor, you will notice a HUGE color shift of everything on the screen as you cycle through the settings. This is without adjusting the red, green, blue, hue or saturation levels on your monitor, which are likely nowhere near calibrated (realistic) to begin with. Now consider the camera and its settings (white balance, etc) and the settings of the software that create the jpeg images and the color settings of your operating system, etc.

The reality is that we just can't use photographs to convery the true color of things. If you want to see the color of something (especially lamps over an aquarium) you need to see them in person.

In any case, nice photos :)