I added red, green, NW, yellow and UV LEDs before I was happy with the color in my tank. I found the biggest issue related to white LEDs washing out many colors, adding the red and green LEDs will create a RGB color effect allowing to cut back on white output. This made the most dramatic effect, the UVs did nothing IMO.
Blue and White (especially cool white) are just not enough to create a good color spectrum for all coral color.
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