Is 440nm or 470nm More Useful?

[Sully32]

I am adding a led bar for supplementation on my tank. The bar has 36 diodes of 470nm. I have 30 diodes of 440nm that I can swap into it if there are benefits.

Would you leave all 470nm, switch to mostly 440nm, or do an even mix of both?

 

[ISpeakForTheSeas]

I am adding a led bar for supplementation on my tank. The bar has 36 diodes of 470nm. I have 30 diodes of 440nm that I can swap into it if there are benefits.

Would you leave all 470nm, switch to mostly 440nm, or do an even mix of both?

Personally, I'd do a mix of both:

"The absorption peaks for the coral symbionts are in in the blue (440–480 nm range) due to chlorophyll a, chlorophyll c2 and carotenoids, and at 662 nm due to chlorophyll a (Halldal, 1968; Prézelin et al., 1976; Dustan, 1982; Kuhl et al., 1995; Levy et al., 2003; Hennige et al., 2009; Niedzwiedzki et al., 2014; Szabó et al., 2014; Wangpraseurt et al., 2014c). "*

*Source:

Underwater Light Characteristics of Turbid Coral Reefs of the Inner Central Great Barrier Reef

Hyper-spectral and multi-spectral light sensors were used to examine the effects of elevated suspended sediment concentration (SSC) on the quantity and quality (spectral changes) of underwater downwelling irradiance in the turbid-zone coral reef communities of the inner, central Great Barrier...

www.frontiersin.org

And a post by Dana Riddle that may help you in your decision:

Limes vs Green Led and Warm Whites vs Red Led

Which do you prefer? limes vs greens leds Reds vs warm whites?

www.reef2reef.com

 

[rtparty]

Depends what your other lighting is missing or lacking