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Is it a must to put actinic light?


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Actinics contribute a certain amount of lighting with suitable wavelengths for coral photosynthesis and is not just merely a cosmetic bulb.

If you are using FL/T5 bulbs, yes, get the actinics to add to the light spectrum.

If you are using wide-spectrum MH and your bulb is a pleasing white-blue already... then there's no need for additional actinics.

Those using more yellow MH needs something to balance the colour so more actinic bulbs can be used.

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