That is a large project may want to start small first for a test run. Or do this
I am building a 135g reef tank currently and am thinking about building my own led
. I have already built a custom led
for my 47g column tank. You can search for the thread the thread is name budget DIY led
experiment , I am pleased with how it turned out, but a 6ft tank is a big difference.
I am thinking about using maybe 3x 100w emitters or 6 x 50w emitters. . Maybe look into something along those lines.
Like this :
I used 10w hybrid blue and white emitters on my 47g, I initially had 9 emitters and I later added 3 more for a total of 120w. Here's a pic.
I also have a dimmer on mine so in the pic they are dimmed down as low as they would go, they are blinding cranked up, like will permanently damage your eyes bright.
Here's a full tank shot with my DIY LEDs on to give you an idea of the color, although the color is different in real life.