Height requirement for a mounted lamp is taken from which point to the ground?

The height requirement for a mounted lamp is measured from the center of the lamp. This approach ensures a standardized reference point that accounts for variations in lamp design and installation. By measuring to the center, it provides a consistent basis for determining how high the lamp is installed, ensuring that it reaches an adequate height for effective illumination and compliance with safety regulations.

Choosing the center as the reference point helps avoid discrepancies that might arise if measurements were taken from other parts of the lamp, such as the base or top. These could yield significantly different heights, impacting overall lighting performance and compliance with traffic standards.