3 watt LEDs are Bright !! - The Planted Tank Forum
 
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post #1 of 12 (permalink) Old 02-08-2011, 03:43 AM Thread Starter
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3 watt LEDs are Bright !!

For those of us just starting out, here are a couple of pictures of a single $1.99 Satistronics, pure white 3 watt LED running at 750ma using a $1.99 Satistronics driver. Delivery took 17 days.
The first is my very much in need of a glass cleaning 75g.
The second is of a wall that is six feet from the LED and the point and shoot Kodak camera.
There is no other light in the room.
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post #2 of 12 (permalink) Old 02-08-2011, 03:47 AM
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Looks nice. If you think that's bright, try a Cree led!

I have 3 Watts flashlight and 1 Cree led... BIG DIFFERNCE!

She winks, Let's dance.

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post #3 of 12 (permalink) Old 02-08-2011, 03:50 AM Thread Starter
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I really want to try a Cree now.
I'm just trying this out and went cheap. So far I really can't say how enthusiastic I am about LED's for a lot of uses.
 
post #4 of 12 (permalink) Old 02-08-2011, 03:56 AM
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Here, I just took this photo.

All lights are off except the Cree.

2 inches from the tank's top.


10 inches from the tank's top.


= )

She winks, Let's dance.

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post #5 of 12 (permalink) Old 02-08-2011, 04:08 AM
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holy crap.
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post #6 of 12 (permalink) Old 02-08-2011, 06:25 AM
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some flash light have "throw" and/or "flood" function, and ofcouse throw flash light will give you a very very bright spot


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post #7 of 12 (permalink) Old 02-08-2011, 10:48 AM
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according to the spec sheets the Cree are 3 times the light output of my cheap ebay LEDs and mine are bright as... too me at least and i have only driven mine to 350mA so i cant wait to get the rest of the gear i need to build my "Hoppy style" fixture and ramp the driver up to 750mA and prob even 1050mA just to see how bright they can be

one day i will buy Cree's or Luxeons and build a medium - high light fixture


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post #8 of 12 (permalink) Old 02-08-2011, 11:11 AM
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I have some 5W (?) Q5 cree led and at night i go out with most narrow beam and light up neighborhood . I can easily light up 60ft in distance. Imagine youre watching film about UFOs and beam of light just passes trough room
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post #9 of 12 (permalink) Old 02-08-2011, 12:28 PM
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Quote:
Originally Posted by IWANNAGOFAST View Post
holy crap.
My thoughts exactly.
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post #10 of 12 (permalink) Old 02-08-2011, 04:57 PM
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I can see that the HLD virus has evolved into a new form! BEWARE!!!

Hoppy
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post #11 of 12 (permalink) Old 02-08-2011, 05:03 PM
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yes , 3 watt crees are very bright ( or efficient ;-)
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post #12 of 12 (permalink) Old 02-08-2011, 09:53 PM
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I have on order 6 Cree XML. Won't be using them over an aquarium but right now they are the BEAST when it comes to insane light in small packages. Has the ability to sling out 1,000 lumens and it's about the same size (slightly larger) than a Cree XRE.


I also have a stash of other LEDs I'm going to put over a 45g cube.

Right now this tank will have LED overkill but I'm only going to drive these at 500mA or so.

The array will have three Meanwell drivers, two dimmable. The other, not (it's all I have):


2 Bridgelux 402 cool whites (roughly 5-8 watts each) and 8 Cree XPG neutral whites, dimmable.

13 Cree XRE Royal blues (dimmable).

2 Satistronic cold white (15K) 20 watt and three red Cree XPE (non-dimmable, driven around 600-700mA depending on how low I can take those huge 15K LEDs).



I have no idea what the final product will be, and honestly this is overcomplicating the LED stuff, but I'm having fun, earning geek points from my co-workers, and getting to play with a lot of LEDs.


Most of these LEDs are actually going to be "left overs" of some LED spectral analysis that I and a friend are doing. I'm putting together the drivers and LEDs, and shipping them to my friend in Wilmington for analysis of various LED combos, both for reef and fw planted tanks.
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