Welcome to Reef2Reef!
Some info from you would be helpful.
How long has your tank been running?
How big is it (gallons & dimensions)?
What do you have (or plan to have) in the tank? Specifically what basic group of corals (soft, zoas, lps, sps)?
In general, the Current line of leds is either for VERY shallow tanks, or for fish only tanks. The leds are only about 0.5 watts and do not penetrate water very deep with enough light for many corals.
You said/asked, "I purchased a current USA marine orbit light and it seems to be great But only emits blue light when plugged in. Now it’s fully customizable but how do i know how much red light to add to the blues?"
It only lights the blue leds? Half of the fixture is white leds, do they work? The red leds are FAR, FAR less important to the over all health of your tank than the blue and the white leds. Most reefers run fixtures like yours (mostly half and half blue and white with a few red and greens added in) with the blue leds at 2 times the power of the white leds, and sometimes even 3 times as much. I run my leds with the blues getting 2.5 times more power than the whites and I don't even run the reds or greens.
How much red and green you add in is almost totally unimportant as there are so few of them and they don't do much to help. The white leds emit a full range of spectrum, including red and green, along with blue, which all put together makes white.
One last question, did you buy this fixture new or used?
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