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Yes, the main difference is wavelength: Royal Blue 450 nm Blue 470nm What you actually need is a range of approx 400 to 700 nm so mixing both...
Looking at all other actinic light systems, they try to get wavelengths as low as 420nm, royal blue is about 450 so even that is not low enough.....
This is a really great project, I am starting my own at the moment so it's not a coincidence I found yours! So much useful info, thanks for sharing...
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