The number of luminaires on a high pole is typically determined by the following factors:

Lighting requirements: The size of the area to be illuminated and the lighting requirements are the primary considerations. Based on the intended use and design requirements of the site, the desired lighting intensity and uniformity are determined, which helps establish the number of luminaires needed to meet the lighting requirements.

Luminaire type and performance: Different types of luminaires have varying lighting effects and coverage areas. Depending on the characteristics and requirements of the site, appropriate luminaire types such as streetlights, floodlights, or spotlights are chosen. Performance parameters of the luminaires, such as power, brightness, beam angle, etc., also influence the required quantity of luminaires.

Lighting layout and uniformity: Proper luminaire layout is crucial for achieving uniform lighting. Considering the shape and size of the site along with the lighting requirements, the arrangement and spacing of the luminaires are determined. Optimizing the placement and quantity of luminaires ensures a relatively even distribution of lighting.

Lighting standards and regulations: Lighting requirements are often guided by local or national lighting standards and regulations. Minimum illumination requirements and spacing limitations for luminaires are considered, taking into account factors such as lighting quality, energy efficiency, and visual comfort.

Economic and budget considerations: The number of luminaires is also influenced by economic and budget constraints. Factors such as investment cost, operating expenses, and maintenance costs are taken into account to determine the appropriate quantity of luminaires.

By considering these factors, lighting design and simulation calculations can be performed to determine the number of luminaires on a high pole. During the actual installation, factors such as installation height, tilt angle, and dimming controls should also be considered to achieve optimal lighting performance and energy efficiency. Professional lighting designers or engineers typically perform detailed calculations and layout planning for luminaire quantity based on specific project requirements.