Simplify the following text for a Grade 8 native English-speaking person.
Original: When the white form is exposed to sunlight or when it is heated in its own vapor to 250 Â C , it is transmuted to the red form , which does not chemoluminesce in air .
Simplified: When exposed to sunlight , or when heated in its own vapor to 250 Â C , it is converted to the red variety .