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King Cap said:
No. Only plants, cyanobacteria and a few Protista like the various types of kelp do photosynthesis. Fungi by definition are consumers and the eat by absorption (so says my biology class), they use the light to know which way to fruit and light is also beneficial as a fruiting trigger. You can make them fruit upside down by shining the light from the bottom, looks crazy

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Doc_T said:
Cubensis uses light for something, though it is not photsynthesis.
But you'll get bigger, better, more abundant fruits under sunlight than using less or no light.
Consider human production of Vitamin D if you need an analogy- we aren't using the sunlight for energy, but we have to have it to be healthy.

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