where to buy good LED? - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 07-16-2015, 06:43 PM Thread Starter
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where to buy good LED?

Hello Guys.

I want to create my own light fixture with LEDs for my planted tank and looking for good price/quality I'm very confused selecting a good place to buy the components ..... for example, I'm thinking to use CREE XM-L2 for this but the price I've found at some sites is very different...

http://www.ledgroupbuy.com/ = $8/unit
http://www.ledsupply.com/ = $9.17/unit
http://www.rapidled.com/ = $6/unit

and other places like http://www.aliexpress.com/store/grou...254899122.html you could find them for $2.98/unit o_O

Any advice in this? any experience?
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post #2 of 3 (permalink) Old 07-16-2015, 07:52 PM
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The quality of the PCB and the heatsinking is very important.
In my experience RapidLED has done a fairly good job of using good components in his construction. His LED PCB(the board the LED is mounted on) are custom and quality. I would imagine the other 2 sites have similar quality.

I can't speak for the other places, but be wary of the chinese sites. They typically are using lower quality PCB boards which have lower quality heat sinks and traces.

You also have to realize that there are typically multiple "qualities" of Cree LEDs. Look at the datasheet for a Cree XM-L2. http://www.cree.com/~/media/Files/Cr.../XLampXML2.pdf
The U2 is significantly more efficient than the T5(~15% more light output). I know that RapidLED lists the binning code. You have to be careful with those aliexpress sales. Frequently they won't list it.
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post #3 of 3 (permalink) Old 07-16-2015, 08:37 PM
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Quote:
Originally Posted by ybendek View Post
Hello Guys.

I want to create my own light fixture with LEDs for my planted tank and looking for good price/quality I'm very confused selecting a good place to buy the components ..... for example, I'm thinking to use CREE XM-L2 for this but the price I've found at some sites is very different...

http://www.ledgroupbuy.com/ = $8/unit
http://www.ledsupply.com/ = $9.17/unit
http://www.rapidled.com/ = $6/unit

and other places like http://www.aliexpress.com/store/grou...254899122.html you could find them for $2.98/unit o_O

Any advice in this? any experience?
Personally I prefer Luxeons over CREE, arguably cheaper and better..
http://shop.stevesleds.com/LEDs_c18.htm

"A man with a watch knows what time it is. A man with two watches is never sure."
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