Greetings. Light beard or delayed growth could be the result of mostly genetic factors. However, would wish to understand that other secondary sexual characters are in place with you - if not you may need a endrocrine assessment. Some people have less beard constitutionally and in some growth may be delayed as it was the case with their father / other make family members. So please consult a qualified dermatologist near you. Further queries may be sent on follow up messaging. Warm regards