Help building a LED fixture
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Old 12-06-2012, 12:59 PM   #1
Mortis
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Default Help building a LED fixture

Hey guys so I have found someone who will be able to make me an LED fixture that I will use above my main display tank that is 30x18x16 inches lxbxh. It will be a dimmable fixture which I think is important in an LED setup. The fixture will be using 3W Cree XPGs. I know all my questions are inter related but Ive broken it down to help me understand better :

1] How many Watts do I need for a Med to High (dimmable) light tank ? Right now I am thinking 18 LEDs for a total of 54W

2] Placement : Im thinking 3 rows of 6 each

3] Optics : Is 90 degrees good for planted tanks with regards to spread and penetration ?

4] Should the fixture be about the same or quite a bit smaller than the tank size ? Considering the spread with the optics and such that all corners of the tank should be lit and the highest that the fixture can be above the surface is 10inches.

Thanks !
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