5000K to 5700K cool white is the standard for parking lots, streets and outdoor security lighting. The higher color temperature improves visual acuity, contrast and facial recognition at night, which enhances personal safety and reduces crime. Cool white light also makes license plates and signage easier to read for both humans and security cameras. Some cities mandate 3000K or 4000K to reduce light pollution and protect wildlife (e.g., sea turtles, birds), so always check local regulations. For residential areas, 3000K-4000K is often preferred to minimize skyglow and neighbor complaints. Ensure the fixture is Dark Sky compliant with full cutoff optics where required.