A cutoff fixture is a lighting fixture that is specifically designed to minimize light pollution, glare, and light trespass with a specific light distribution pattern. A cutoff fixture directs part or all of its light downward, with less or no light emitted upwards. This design helps to reduce skyglow and light pollution by preventing light from escaping above the horizontal plane. The fixture achieves this by shielding the light source and ensuring that all emitted light is directed towards the intended area.