LED lighting of Residential Areas - The economical option for Local Authorities By Daniel Kasper and Johann Schleritzko
Power required, in kw / km Power consumption per km of road, to generate the required lighting levels in terms of SANS 10098, for Class B roads, comparing different lamp sources 4 3.5 3 2.5 2 1.5 1 0.5 H P S M H L E D H P S M V C F L L E D H P S M V C F L L E D 0 Class B1 Roads Class B2 Roads Class B3 Roads
Cost comparison, Class B1 Roads, Residential streets with medium to high volume traffic Group, in terms of SANS 10098 B1 100W HPS 150WMH LED 77W Cost of luminaire, inclusive lamp R 1257.6 1325.6 3563 Energy consumption per year, based on R 0.58 per kwh R 438 682 293 Total annual lamp replacement costs R 167.4 376.7 0.0 Cost of ownership over 5 years Initial Capital cost R 1,258 1,326 3,563 Total Energy cost R 2,191 3,410 1,467 Total Lamp Replacement Cost R 837 1,883 0 TOTAL COST OF OWNERSHIP AFTER 5YEARS R 4,286 6,619 5,030 Cost of ownership over 15 years Initial Capital cost R 1,258 1,326 3,563 Total Energy cost R 6,573 10,231 4,401 Total Lamp Replacement Cost R 1,004 2,260 0 TOTAL COST OF OWNERSHIP AFTER 6 YEARS R 8,835 13,817 7,964
Cost comparison, Class B2 Roads, Residential streets with medium volume traffic Group, in terms of SANS 10098 B2 70W HPS 57W CFL LED 45w Cost of luminaire, inclusive lamp R 1197.6 1280 2680 Energy consumption per year, based on R 0.58 per kwh R 324 248 171 Total annual lamp replacement costs R 167.4 219.9 0.0 Cost of ownership over 5 years Initial Capital cost R 1,198 1,280 2,680 Total Energy cost R 1,620 1,238 857 Total Lamp Replacement Cost R 837 1,099 0 TOTAL COST OF OWNERSHIP AFTER 5YEARS R 3,654 3,618 3,538 Cost of ownership over 15 years Initial Capital cost R 1,198 1,280 2,680 Total Energy cost R 4,859 3,715 2,572 Total Lamp Replacement Cost R 1,004 1,319 0 TOTAL COST OF OWNERSHIP AFTER 6 YEARS R 7,060 6,315 5,252
Cost comparison, Class B3 Roads, Residential streets with low volume traffic Group, in terms of SANS 10098 B3 70W HPS 57WCFL LED 45W Cost of luminaire, inclusive lamp R 1197.6 1280 2680 Energy consumption per year, based on R 0.58 per kwh R 324 248 171 Total annual lamp replacement costs R 167.4 219.9 0.0 Cost of ownership over 5 years Initial Capital cost R 1,198 1,280 2,680 Total Energy cost R 1,620 1,238 857 Total Lamp Replacement Cost R 837 1,099 0 TOTAL COST OF OWNERSHIP AFTER 5YEARS R 3,654 3,618 3,538 Cost of ownership over 15 years Initial Capital cost R 1,198 1,280 2,680 Total Energy cost R 4,859 3,715 2,572 Total Lamp Replacement Cost R 1,004 1,319 0 TOTAL COST OF OWNERSHIP AFTER 6 YEARS R 7,060 6,315 5,252
KEY FOCUSES ON LED LUMINAIRES Performing Future Proof Reliable
Performing
LED Luminous Efficiency compared to other light sources 2015: 150lm/W 2011: 112lm/W LED
Reliability, Lifetime
Photometry with LEDs : completely different? No Road Units : Lux, Cd/m², lumens, Watt, Light distribution Norms Same objective : Higher levels for less power with good uniformities! The solutions to control light are different!
Optimization of the utilization factor K "Unusefull" light Cut-off Effect Need to illuminate the side walks and facades! LED islolux HID islolux
Main Roads Luminance (A-roads) Residential Roads Illuminance (B-roads)
Path, sea front Parks, Squares
Future Proof
Upgradeable LED Engine and Electronics Future Proof The luminaire has to allow for on-site replacements of the photometric engine and electronic assembly at the end of an LED s service life, and thereby allow to integrate future innovations. Maximum Energy Saving To utilize the increasing energy saving possibilities that LED s and electronics will offer, the system should be upgradable whenever needed.
Serviceable Reliable
LED luminaires are part of an integrated system Thermal Mechanical Good thermal contact. LED temperature feedback. Optimized heat exchange surface. Electronic Highest quality of material. IP 66 rated gear compartment and photometric engine. Smooth Protector. Photometric Higher lifetime than LEDs at max. ambient temperature. Surge protection. Large primary voltage range. Objective : Higher levels for less power with good uniformities.
Conventional Street light Local Content comparison Local Content: Housing Protector Clips Imported Content: Lamp Ballast Igniter Condenser Lamp holder
LED Street light Local Content comparison Local Content: PCB (printed circuit board), excluding the LED chip Power Supply Housing Imported Content: LED chip
Local Content comparison, 80% local content 60% local content
Conclusion The time has come to apply LED street light luminaires for Class A4 and Class B applications. LED technology gives local companies the chance to increase the value-adding component in South Africa, increasing job creation and export opportunities.