Semi-cutoff and full-cutoff wall pack lights differ in how they direct light downward.
Semi-cutoff wall pack lights have a lens that allows some light to escape above the horizontal plane, which means some light is directed upwards and can contribute to light pollution. They are usually used in areas that require a moderate amount of downward lighting and where some upward lighting is acceptable, such as sidewalks or building facades.
Full-cutoff wall pack lights, on the other hand, have a lens that fully encloses the light source, directing all light downward and preventing any light from escaping above the horizontal plane. This makes them a better choice for areas where minimizing light pollution is a priority, such as residential areas or sensitive wildlife habitats. They also provide a higher level of security as the light source is not visible from the ground.
In summary, semi-cutoff wall pack lights are more suitable for areas where some upward lighting is acceptable, while full-cutoff wall pack lights are more suitable for areas where minimizing light pollution and improving security is a priority.
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