It draws necessary moisture from the air and is nonphotosynthetic, so it requires no light.    From Wordnik.com.  [Flinx In Flux]

Measurement of in situ activities of nonphotosynthetic microorganisms in aquatic and terrestrial habitats.    From Wordnik.com.  [Uncertainties in the understanding of ecological processes and changes driven by climate and UV-B radiation] Reference

Even nonphotosynthetic bacteria respond to light in surprising ways.    From Wordnik.com.  [News from The Scientist] Reference

Carotenoids are widespread lipophilic pigments synthesized by all photosynthetic organisms and some nonphotosynthetic fungi and bacteria.    From Wordnik.com.  [Journal of Biological Chemistry current issue] Reference

But it's an idea that has not been widely-nor immediately-embraced, and some believers of light's importance to nonphotosynthetic bacteria have struggled to convince collaborators to simply check experiments for the effects of light.    From Wordnik.com.  [News from The Scientist] Reference

I’m not sure what area of biology a bat intelligence would support but perhaps an aspect of applied microbrobiology since caves have been proposed as a unexplored resource for new antibiotics and are also study sites for nonphotosynthetic based ecosystems.    From Wordnik.com.  [Should Science Pursue Methodological Supernaturalism? - The Panda's Thumb] Reference