6 pm, Feb. 11, Mansfield Public Library, 54 Warrenville Rd., Mansfield, CT. Join TLGV’s Lead Night Sky Rangers Geoff and Kim McLean to learn the basics of light pollution reduction. Geoff and Kim are experienced night sky educators with more than three decades of engineering experience each. They will share their vast knowledge of lighting mechanics and the negative effects of light pollution. Participants will come away with actionable insights and an understanding of how good lighting can be safe, cost effective and reduce the negative impacts on our night skies.