Difference between actinic 3 and actinic blue

[jjohnson3]

Which is darker? is 460 or 430 nanometer darker?

[kkgeorge]

Which is darker? is 460 or 430 nanometer darker?

 

430 is darker

[mnherper]

+1^^^

[121a]

420nm is best for florescence of corals.

[Rocket]

damn it. Now that I found this thread I feel stupid for posting my own exact same question.

 

And by darker you mean more Violet?

[evilc66]

Yes. 470nm is more blue.

 

And it's not that the 420nm is "darker" per se, but your eye is less sensitive to the light being emmited.