Are blue LED lights justfor color?

[GwenInNM]

Or do they assist with growth too?

Thanks

 

[Pete polyp]

Anyone going to touch this with a 10' pole?

I'm interested in the response.

In theory the blues create the color that is on the lower end of the spectrum that is absorbed by chlorophyll to result in photosynthesis.

 

[DFWreefjunky]

As light hits the water it absorbs stronger on the red end and weaker on the blue, which is why it appears blue. The ocean has colors pending on particles in the water and the more photo present the greener the color. It can be same for a swimming pool inside, deeper the water bluer it appears. Therefore, I believe the blue to be a crucial color spectrum but not necessarily to the extent of what we use to get the higher K color temps.

 

[Pete polyp]

Kelvin rating and nanometers are not related. Nanometer is the wavelength of the light and Kelvin came from what color an iron pot turns at so many degrees Kelvin. .

This is how chlorophyll absorbs the different colors

This is how the spectrum is filtered in water

 

[Keithcorals]

Corals will grow under just blue light so yes blue light is more than just a way to make things look nice

 

[GwenInNM]

Thanks all ! Im wondering because I wonder how long to have lights on total hours a day. I have mine on 9 total with just blues on for 2 of those hours. Any changes you'd make? My lights are dimmable and whites r on at 35% blues at 50%

 

[SantaMonicaHelp]

This is very interesting! I was wondering the same. Thanks for the answer!