Originally Posted by Adragontattoo
There are always exceptions to the general rules and I know that the Luxeons and CREE LEDS are those. I was giving the basics from my experience using them in the hobby (Computers, and general tinkering) mindset.
Understood, but for aquarium use, high power Luxeon and Crees are more appropriate (except perhaps for tiny tanks and containers) than the lower-power traditional "super bright" LEDs.
Originally Posted by russell
so guys, if you wanted to design an array preferably using cheaper led's what ratios of colors would you use? IE 40% red, 20% blue etc.
if you guys can give me somthing that you think would work i will build it and then give the results here.
Remember that the human eye sees with red, green and blue cones. So, LEDs that appear "white" use a mixture of red, green and blue emitters. People on this board have had good luck with high power LEDs described as something like "6500". LEDs labeled like this usually have enough reds and blues to grow plants. One could add blues and reds with nanometer ratings most favorable to plants if you want to go the extra mile.
For tiny, 5 gallon and less tanks, I am trying the following:
11-WHP6 White LED bulb
MR11 with 6 High Power White LED 12 Volt AC/DC operation, GZ4 base,
Produces 65 lumens at 7000K, 120 degree beam pattern
approx 80 lumens per watt
$ 14.95 each
Note that this is probably not practical for anything larger than 5 gallons. I'm thinking that around 6 of them will be needed for a 5 gallon tank. But, these are very convenient to use since you don't have to individually solder a bunch of LEDs, and it doesn't need current regulation. Also one can disassemble these from one project to another with little effort until one finds the most appropriate use for them.