I wanna make something for my bio... so it needs to be small.. well cooled and be able to disperse light. I'm not looking for a ton more light in the unit just.. well less electricity used and something different to try lol.. I can sadder. Where should I start?
For total replacement:
I have a 10G tank with 6 white (Cree CR-E) and 6 blue (Cree CR-E) leds with individual heatsinks (Wakefield 658-35AB) driven by two buckpucks (1000mA) at 60% white and 75% blue, powered by a 24V power supply from ebay. I also have 4 40mm fans to move air out of my original tank hood. I'd say the same setup will be enough for your 14G bio as well.
In addition have an Arduino controller that does sunrise/sunset.
In general you want 1 LED for evern 10-20in^2 of surface area. (10 will be very bright, 20 will be enough for most mixed reefs), then depending on the height of the tank you supplement with lens. LEDs are usually driven at 500mA so that they "live" longer. You don't have to worry about lens, unless you want to mount the lights on the ceiling like this guy did: http://reefcentral.com/forums/showthread.php?t=1784873
I think I wanna replace it. I'm just lost on how and what they need to run smoothly. and if it's cost efficent to DIY. On one hand I want the experience but on the other I don't wanna pay nearly the same for something I could buy. And if I do learn how to do this. I'd like to try it on a couple other things.. like only 2 or 4 led setups. maybe even led strips for my fuge.
LEDs cost roughly 10 bucks per LED (final price), so 12LEDs would run you about 120-130 bucks (or maybe less) in parts.
This is a good place to buy kits if you don't want to search for parts yourself: http://www.rapidled.com/servlet/the-DIY-Retrofit-Kits/Categories
That being said if you're not sure about LEDs it is best to just get 2-3, as you said, and give them a try over a section of your tank.
As for buying an LED fixture, I don't think you have too much choice there. It seems like almost everybody here builds their own.
How much electricity are u useing and is it better then b4 or the same? oh and whats the hardest coral u've tryed with that light? and how pricey/hard was it?
I used 13 Cree Q5 cool whites and 13 Cree royal blue. The sink would get hot without fans but I have two built into the hood. I don't believe that the heat sink is too large. There are many DIY LED threads. Great for reference.
I don't have a par meter, and lux is not really useful. 1 LED produces about 200lux (at 700mA). I do have a lux meter though and if you're interested I can measure it.
There was a thread under Reef Discussions about a guy who took measurements and he had something like 1000par under water at 7" from the 24leds with 60 degree lenses. If I find the thread I'll post the info here.
Edit:
This is what I was looking for:
Hey Greg. I have not measured the output with any meter. FWIW, the light is brighter and the corals look better. I also get some shimmer with better light spread compared to the old halide. I do not use optics. They are not necessary for small all-in-one aquariums.
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