Success with LED and SPS

[mrhasan]

Originally Posted by Ryan-b

I built it about a year ago with 72 3w Cree RB, 24 cw, and 24 high noons. It's a little late to add some of the new LEDs that have came out unless I want to redo it all.

CW flushes out a lot of green and blues. Red looks better but thats all for CW. That's why people started using nutral white (4500k-6000k). 2:1 RB:NW gives 14K look, something for which people moves to MH I guess.

For full spectrum, it should be 5:2:2:1 RB:NW:TV:RGB for full spectrum. True violet (405nm) actually pops up a lot of colors that RB:NW cannot and it triggers a specific region of photosynthesis too. UV (390nm) on the other hand, is actually bad, possibly because the wavelength gets shorter in water from the source.