Want to protect the night from light pollution? Get started in your own backyard (or front porch, walkway, bedroom window, rooftop – anywhere!) 

Download and follow this step-by-step guide to conduct an outdoor lighting assessment around your house, apartment building, property line, business, community center, wherever, to evaluate the impact of your light on the night. 

https://www.darksky.org/our-work/lighting/lighting-for-citizens/residentialbusiness-lighting/