I think perhaps that a poisonous effluvium is emitted from the luminous substance.
Telogen Effluvium: Loss caused by physical or emotional stress, abnormal thyroid activity, medication, or hormonal fluctuations.
In common with the other animals of the genus, it has a very peculiar and disagreeable effluvium, which, according to Dr Coues, is more powerful, penetrating and lasting than that of any animal of the country except the skunk.
The most common causes of telogen effluvium are: Physical stress: surgery, illness, anemia, rapid weight change.
There are two different types of alopecia, medically known as anagen effluvium and Telogen effluvium.