Here, we take a circular traffic-light model used for vehicles as
these lights are the ones that require the most repairs and replacements
of the LEDs. The model used is represented in the following
figure. To measure the height of the traffic light, with its curved
segment, we estimated the length of the arc, calculating 8.694 m.
The measurements chosen for the calculations were 6000 mm of
vertical column (H) and 4000 mm of horizontal extension (w),
and a disk diameter of 200 mm (see Figs. 1 and 2).
The conditions of the emission angles were the same as in the
INTERNATIONAL STANDARD ISO 165085 CIE S 006.1/E [17].