Below 420nm is it necessary?

[hart24601]

Here you go...

Thank you!!! Wow that 420 is really broad!

 

[Heabel7]

I wonder how Broad the LEDs are by brands and bins.

 

[Heabel7]

Reef breeders 420nm semi Led (very common led in high end lights)

 

[Aardvark1134]

Chicago if you truely want a 420 and below light you can get a custom led bar OR3 from orphek with nothing but all 410 and 420nm leds in it to supplement what you have now.