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Why this lamp is lightning almost 360 space ?
Most uses of light need half space or less. To be clear, street lightning need to light the street, not the sky. So ? cut power by 50% and orient the lamp correctly.
Another example is the Fresnel light house where the lens system attempts to collect and re-direct light that goes away in the wrong direction.
This lamp can be manufactured so that the light goes only where it is needed.