lightface

[lahyt-feys] /ˈlaɪtˌfeɪs/
noun
1.
a type characterized by thin, light lines.
This is a sample of lightface.
adjective
2.
Also, light-faced. (of printed matter) set in lightface.
Compare boldface.
Origin
1870-75; light2 + face
British Dictionary definitions for light face

light face

noun
1.
a weight of type characterized by light thin lines Compare bold face
adjective
2.
(of type) having this weight