Lambda Cancri (λ Cnc, λ Cancri) is a star in the constellation Cancer.
λ Cancri is a blue-white B-type main sequence dwarf with an apparent magnitude of +5.92. It is approximately 419 light years from Earth.
In Chinese, 爟 (Guàn), meaning Beacon Fire, refers to an asterism consisting of λ Cancri, ψ Cancri, φ1 Cancri and 15 Cancri. Consequently, λ Cancri itself is known as 爟二 (Guàn èr, English: the Second Star of Beacon Fire.). From this Chinese name, the name Kwan Wei meaning "the bright fire" was appeared.