30 Watts Enough

It would probably grow, but incredibly slowly, that's hardly any light for such a big tank.

Sam
 
double that up. i don't think much grows with under 1 wpg..
 
You cant answer that question! What you can say is that sunlight reaches the earth surface at around 198w per square metre and has a kelvin of around 5500k.

Perhaps in that case we should think about trying to get a certain watts per square metre over out planted tanks rather than WPG?

Sam
 

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