With reference to KAUST request letter no. KAUST-M&U-14-0071 dated September 21, 2014 to incorporate LED lights into the KAM road design, the following points are to be considered:
1.	Technically, changes with the fixture type from HPS to LED have significant impact on the electrical loads. SAES P-123 table 4 requires a minimum of 10 lux for the roadways. With a 30 meter spacing of the lighting pole to meet the existing lighting arrangement, an LED lighting fixture needs at least a minimum of 23,000 lumens to meet the illumination requirements which cannot be found in the market. To use the available lighting LED fixtures in the market, we need to increase the number of poles and decrease the spacing pattern. Additional switch racks, fixtures, and LV cables will be required.
2.	The approved lighting type as per project scope of work for KAM access road is 250 watts High Pressure Sodium type and this is already delivered to site.
3.	High Pressure Sodium and Metal Halide type are the only approved fixtures for street lighting/ outdoor lighting according to Saudi Aramco Standard SAES P-123.
This change at this stage of the project shall require a complete redesign of the electrical systems, cause delays in delivery of KAM road and have significant cost impact. Therefore, SAPMT will proceed in providing the lighting type as per the original project scope.
Should you have any questions, please contact Dr. Ahmed S. Khogeer, Sr. Project Engineer (A) at (012) 422 4423.
