12m Street Light Pole

1. Road Classification and Width

The choice of height is dictated by the "scale" of the road:

    8m (Secondary/Local): Best for roads 8–10 meters wide, typically 2-lane residential or industrial streets. The light is concentrated for lower speeds.

    10m (Major Arterial): Standard for roads 12–15 meters wide, typically 4-lane city boulevards. It balances spread and intensity.

    12m (Expressway/High-Speed): Specifically designed for ultra-wide roads of 16–25 meters. This is the requirement for 6-lane or 8-lane highways, ring roads, and major cloverleaf interchanges.

The Engineering Logic: Only a 12m height provides the necessary "light throw" to reach the center of a 6-lane highway, eliminating dangerous dark spots in the middle lanes.

2. Luminaire Power and Photometric Requirements

As height increases, the lumen output must increase exponentially to maintain ground brightness (Lux levels):

    8m: Paired with 80W – 120W LEDs.

    10m: Paired with 120W – 180W LEDs.

    12m: Typically requires 150W – 250W high-output LED fixtures.

The Reason: Light loses intensity over distance ($1/d^2$ law). To ensure the road surface meets international safety standards for "Average Illuminance," a 12m pole needs a powerful engine. Decano's 12m solutions prioritize high-lumen chips to ensure drivers have maximum "Stopping Sight Distance" at high speeds.

3. Spacing Strategy and Project Economics

The 12m pole is often the most "economical" choice for massive infrastructure projects:

    8m Spacing: Usually 25–30 meters apart.

    10m Spacing: Usually 35–40 meters apart.

    12m Spacing: Can be stretched to 45–55 meters apart.

The Advantage: For a 10km highway project, while a 12m pole costs more per unit, you need significantly fewer of them. This reduces the number of concrete foundations, the amount of copper cabling, and long-term maintenance stops.

4. Structural Integrity and Wind Resistance

Height adds mechanical stress, requiring Decano to reinforce the 12m design:

Wall Thickness: While 8m poles can use 3.0mm steel, 12m poles generally require 4.5mm to 6.0mm thickness.

Vibration Control: 12m poles have a higher "oscillation amplitude" in the wind. They feature larger base flanges and reinforced anchor bolt patterns to withstand the "lever effect" during storms, making them suitable for open areas like coastal ports, airports, and bridge bypasses.

At-a-Glance Comparison Table