Traffic lights example: Swartland Municipality, Western Cape
Technology: 50 robots with 50W (watt) light bulbs replaced with 9W LED light bulbs
Cost: ZAR 1,860,000
Savings: 29 MWh annually
Payback period: 6.5 years
Specifics: Swartland Municipality is a small municipality which gives continuously high attention to energy efficiency technologies for its infrastructure. Swartland started with technical measures on traffic lights and is currently continuing with latest technologies for LED street lighting.
High masts example: Nelson Mandela Bay Metropolitan Municipality, Eastern Cape
Technology: 360 high masts with conventional light bulbs replaced with 400W LED light bulbs.
Cost: R 8,856,360
Savings: 1,050 MWh annually
Payback period: 6.9 years
Specifics: Nelson Mandela Bay Metropolitan Municipality contracted a locally-based company to instal and maintain 360 latest technology LED high masts, in its townships.
Office buildings example: Harry Gwala District Municipality
Technology: 912 57W conventional light bulbs replaced with 14W LED light bulbs
Cost: R 958,000
Savings: 83 MWh annually
Payback period: 6.3 years
Specifics: The former Sisonke Local Municipality has delegated its responsibilities for municipal street lighting to the Water Department of the Sisonke District Municipality because of the District Municipality’s better engineering and managing capacity. Sisonke District Municipality has also agreed to a service contract with a local company for the installation of new LED street lights.
Street lighting example: Mafube District Municipality
Technology: 1,409 mercury vapour (MV) street lights replaced with high pressure sodium (HPS) street lights.
Cost: R 2,517,344
Savings: 639 MWh annually
Payback period: 6.2 years
Specifics: Mafube District Municipality implemented an exchange programme for mercury vapour street lights to more efficient HPS lamps.
Waste water pumps example: Polokwane Local Municipality
Technology: 36 high pressure pumps with variable speed drives
Cost: ZAR 1,000,000
Savings: 2,322 MWh annually
Payback period: 3.9 years
Specifics: Polokwane Local Municipality had previously improved their traffic lights and street lights. In recent years, it has concentrated on new wastewater pumps with variable speed drives. This technical measure has a comparatively short pay-back period due to its efficiency.