Blue light smells like bananas.

That’s how Science Daily says life is like for fruit flies who’ve had their smell gene connected to the light gene:

Normally animals avoid light. However, blue light simulates in genetically modified larvae the smell of an odorant, e.g., banana, marzipan or glue — odors which are all present in rotting fruit and attractive to fruit fly larvae. The team of scientists from Bochum and Göttingen, working under the auspices of Prof. Klemens Störtkuhl, hopes to gain insight into the processing of the neural network.

These successfully employed methods are now also being used in model systems i.e. mice in other laboratories….

Yeah. Mice. Smell the light.