I beg to differ on that. If they only need light then why do they have mouths, to filter feed.
Now, say I was to use the Cyclopeeze... Would I notice any sort of color enhancement like the product states.
Plants and tree's use photosythesis but still have roots to gather nutrients. Same with zoos yes they can survive with just light but to keep them healthy and able to fight off disease wouldn't supplemental foods help?