The Southeast Florida Library and Information Network (SEFLIN) has presented the Sun Seeker Leadership Institute biennially since 1997. SEFLIN, a multitype library consortium headquartered in Boca Raton, Florida, was one of the first groups to sponsor a library leadership institute held as a monthly series of events over the period of a year. One hundred library staff members from all types of libraries, large, small, public, and academic, have completed the leadership institute. After twelve years and six cohorts, SEFLIN is reviewing the project's impact. This article outlines how and why the leadership institute was created, the program's goals and format, and presents the results of a survey of past participants. The authors suggest further study of how participants are affected by the leadership styles modeled by their supervisors. (Contains 2 figures.)