Dry theory.

Дата на публикуване: Sep 22, 2010 5:56:42 PM

In last few years I saw a lot of aquarium lighting using high power LEDs, and I personally develop few boards for some bars LED light effects.That is why I decided to use LEDs as main light source.

Another reason for using LEDs is that they can be controlled using simple PWM not some expensive ballast units!

Personally I didn't find any research, on internet, for the influence of pulsing light over the plants.I choose frequency of 300Hz let's hope everything will be OK.

The next step was to find out what spectrum of light does the tropical plants need.I found this site.

The say that the plants need mostly red and blue part of the light ( after all that's why the plants are green ).Then after searching and asking questions in our local bulgarian plant's forum I choose the leds.

I found few LEDs that are suitable for my application ( and cheep enough ).Finally I choose AVAGO ASMT-JY31-NSU01 and AVAGO ASMT-JW31-NUV01.

I took cold and warm ones because the plants need strong red and blue portion of the spectrum.

6 warm and 6 cold led with total light flow 1400 lum.I think it will be better when the light is coming from more than one place.That is the reason for using 12 White leds with total power of 36W.

Meanwhile one friend gave me 2 AL PCBs of EDISON OPTO 3W RGBs. with total of 6 RGB LEDs.Each RGB lead can provide ~100lum of light.So the total for the vivarium I have 1400+600 lum = 2000lum.

Each of the color ( WW, CW, R,G,B ) can be controlled separately so it's possible to use the RGBs to strengthen the white leds, and to create a nice color effects like red color during sunrise for example.