Gradually, in small increments, an antibiotic was added to one of the test tubes. The organisms in the treated test tube soon became resistant to the antibiotic but the organisms in the adjacent test tube did not. This time the organisms in the untreated test tube become just as resistant to the antibiotic as those in the treated test tube. The inference is, of course, that biophotons from organisms in the treated test tube taught the organisms in the untreated tube how to resist the anti-biotic agent.
Light clearly plays a physiologic role in plant life via photosynthesis.
Its role in animal life, though not always appreciated, is well known. Rickets, a bone disease of children, is prevented by sunlight and vitamin D for example. Bill Curry will confirm that there are two mechanisms in physics whereby electric and magnetic fields affect photons. The Faraday effect entails the rotation of polarized light in magnetic fields. The Kerr effect describes a similar effect with regard to electric fields.