Refugium light - When to run it?

[I think it is more of personal preference than anything else.

However, if you have culerpa then 24/7 is suppose to prevent it from going asexual and poluting the tank.

I only have cheato but run mine 24/7 to always have it growing and absorbing nitrates.]
 
[I used to run my refugium light on 'reverse-lighting' which would be on when the main display was off. Caulerpa grew nicely, but several times over a period of a few months, it would 'go sexual' and die. Changing my lighting to 24/7, it never did that again, and I stopped having to buy more of that plant.

Cheatomorpha can be in darkness without a problem,btw.

Reverse-lighting is designed to help maintain pH. pH drops when your main lights are off, but the refugium can bring it up during the late night hours.]
 
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