Spectral Type B stars are hot, massive stars that emit a blue-white light. They have surface temperatures ranging from about 10,000 to 30,000 Kelvin. These stars are typically larger than our Sun and can be several times more massive. Their strong ultraviolet radiation influences their surrounding environment, often leading to the formation of new stars. These stars are relatively short-lived, with lifespans of only a few million years. They are often found in young star clusters and are important for studying stellar evolution. Examples of B-type stars include Sirius B and Altair, which are known for their brightness and distinct color.