Ecotech Marine’s Radion XR30w wins the 2011 Reef Builders LED showdown

[MarkoD]

Originally Posted by fishytime

I never said that running all red would give great results, or be the miracle coral growth formula (in fact it wont).....but you said that. the red and green LEDs were useless, which they arent.....the red spectum gets filtered out of the water very quickly so deeper water corals tend to not take to red very well, but shallower water corals will benefit from lower color temperatures....the radion provides probably the closest to full spectrum lighting as wee can get atm

Thats exactly what I've read. Sea water partials absorb red and green light.

So how deep do you figure red light from 12 watts of led will penetrate?

I just want to see if a coral will recognize the fact that light is available