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Old 07-10-2008, 10:50 PM   #31
marine_lover
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Quote:
Originally Posted by BarraCuda™ View Post
Homemade ....

Hi BarraCuda,

Are you using silicon/glue to stick the K2 to the Aluminium plate? wouldn't the heat melted the silicon/glue?

btw, I have some doubt and hopefully you can advice me before I jump into DIY my LED lighting.

Questions are as below;

1.What's the best distance/gap between each of the K2?
2.Why do you need 5W K2? 3W not enstuff?
2.How many K2 can one driver connected (in series)?
3.Are you using 24Vdc,1A power supply for K2? or higher voltage?
4.Do you use fan to reduce the heat?
5.Where do you get the Aluminium sheet from? Is it Ex?

Regards.
James
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Old 07-10-2008, 11:45 PM   #32
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Can K2 star purchase locally ?
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Old 10-10-2008, 03:06 AM   #33
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Bro... So the result is with how many of the LEDs on?

Thanks... I am considering to DIY too... Thanks..
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Old 10-10-2008, 01:24 PM   #34
BarraCuda™
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Quote:
Originally Posted by marine_lover View Post
Hi BarraCuda,

Are you using silicon/glue to stick the K2 to the Aluminium plate? wouldn't the heat melted the silicon/glue?

btw, I have some doubt and hopefully you can advice me before I jump into DIY my LED lighting.

Questions are as below;

1.What's the best distance/gap between each of the K2?
2.Why do you need 5W K2? 3W not enstuff?
2.How many K2 can one driver connected (in series)?
3.Are you using 24Vdc,1A power supply for K2? or higher voltage?
4.Do you use fan to reduce the heat?
5.Where do you get the Aluminium sheet from? Is it Ex?

Regards.
James
1.Depends on the heat sink thickness, typically min distance should be 1" apart.

2.I happened to find a batch of cheaper 5W thats why bought some to try.

2.Depends on the forward voltage of the LED. You add up all the forward voltage and it shall not exceed the max rating of the driver and power supply.

3.I'm using various power supplies from 30V to 24VDC, ranging from 5A to 3A.

4.No fan in used.

5.Aluminium sheet can be found in most aluminium hardware stores, mine cost about $70.
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Old 10-10-2008, 01:27 PM   #35
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Quote:
Originally Posted by marine_lover View Post
Can K2 star purchase locally ?
Can, from farnel singapore but be expected to pay many times the US price.

Quote:
Originally Posted by Terryz_ View Post
Bro... So the result is with how many of the LEDs on?

Thanks... I am considering to DIY too... Thanks..
All the LEDs are on, about 50+pcs.
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Old 11-10-2008, 12:03 AM   #36
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Quote:
Originally Posted by BarraCuda™ View Post
1.Depends on the heat sink thickness, typically min distance should be 1" apart.

2.I happened to find a batch of cheaper 5W thats why bought some to try.

2.Depends on the forward voltage of the LED. You add up all the forward voltage and it shall not exceed the max rating of the driver and power supply.

3.I'm using various power supplies from 30V to 24VDC, ranging from 5A to 3A.

4.No fan in used.

5.Aluminium sheet can be found in most aluminium hardware stores, mine cost about $70.
This is very useful.. Thanks... Will update when i DIY.. Haha..
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Old 11-10-2008, 11:14 AM   #37
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Quote:
Originally Posted by Terryz_ View Post
This is very useful.. Thanks... Will update when i DIY.. Haha..
Look into the CREE LEDs, now they have a higher power efficiency than lumileds.
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Old 11-10-2008, 03:13 PM   #38
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You mean this?
http://www.ledsupply.com/creemce.php

Was thinking of using K2 and Luxeon III with optical lens...
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Old 12-10-2008, 02:06 AM   #39
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You mean this?
http://www.ledsupply.com/creemce.php

Was thinking of using K2 and Luxeon III with optical lens...
Nope, its the XR-E series.
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Old 12-10-2008, 04:59 AM   #40
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Nope, its the XR-E series.
OK.. Thanks, will look into that... May I know your tank height? Other than the sps, the other corals are doing well also?
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