Quote:
Originally Posted by Horace
I seriously doubt that it was too much. The algae was very dark. Not the light yellow you see when it's too intense
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Hi Horace; your screen looks to be about 8" by 6", so your 50 Watt
fully red spectrum LED light unit would give you a bit over 1W of red spectrum per square inch of screen.
The most effective wattage, for fully red LED, is about 0.27 to 0.4 Watts per square inch of screen. So your 50 Watt red light unit was way too much.
When the wattage, or intensity is too high this causes photo-saturation, & photosynthesis ceases. No, or little growth.