The Board of Health has voted to support legislation proposed last month to create an independent state commission to study the health effect of wind turbines. The board sent letters to Kingston’s legislators and the governor to express its support. Although the state Department of Public Health last year concluded that wind turbines present no known health risks, some Kingston residents have complained that noise and shadow flicker from the town’s turbines have harmed their health. A recent study of the effect of the flicker from the turbine built on town-owned land suggested that the impact was greater than previously believed. The turbine’s co-owner, Kially Ruiz, said the study exaggerated the impact of flicker, but backed the legislation, saying he welcomed a “science-based conversation” on wind turbines.