Accumulated skyglow from a small city can be seen many miles away, so this is not just a problem of direct glare. Please help preserve the majesty of the heavens for our children by using shielded lights whenever possible. How You Can Help Use good lighting. Use quality lighting fixtures, ones that control the light output, putting it only where it is needed and wanted. Never use fixtures that spray light everywhere.
Glare always harms visibility, and most glare comes from poor fixtures or poor installation.
Since glaring lights produce visual discomfort and compromise safety by reducing visibility and casting harsh shadows, they should be avoided. Use softer, more uniform lighting that shields the light source and spreads the light evenly. Shine the light down. Keeping the light confined to your property will avoid the potential for complaints about light trespass. Use energy efficient light sources and time controls or dimmers if possible.