Whats the difference between tuna sun and tuna blue ?
With the 360 there is no difference per say, same fixture, but you can adjust the color between 10k to 20k.
I have 4 360we on my 120, and they grow corals and look amazing. As others have said best color pop and shimmer in any led I've seen. Keep in mind the awesome color blend of this light also makes it lower par (<100 @ 24"), so depending on what you want to grow, you may need more than one per 24" x 24" x 24" cube as recommended by Kessil.