NATIONAL LIGHTING CODE SP 72:2010

Is this Road Lighting correct ? And what about this???

Confusion !!!!!! What standard should be considered for SAFE and appropriate illumination on different type of Roads ? What should be Minimum lux level ? What should be Average lux level? What should be the minimum input system load per km to achieve appropriate Illuminance? How to verify the uniformity?

NATIONAL LIGHTING CODE

Important aspects for street lighting Visibility as per Road types. Selection of Most Efficient System to achieve lowest Energy Consumption per km. Capital cost saving using proper spacing and placement. Maintenance cost saving. Sense of security and wellbeing. Safety of motorists, cyclists and pedestrians.

Road Lighting (Part 8) This part of the code generally covers all aspects of road lighting including normal street lighting, associated with service road, pedestrian pathways and road junctions excluding the traffic signals or painted boards.

Indian road network Indian road network of 33 lakh Km.is second largest in the world.

Road classification B2 road Secondary roads with light traffic. Society Roads, Market Road etc. Any road with motor vehicular traffic. Uniformity Ratio > 0.3 Transverse Ratio > 0.2 Average Lux (Eav) > 4

Road classification B1 road Secondary roads with considerable traffic like principal local traffic routes and shopping. Main Market Road. Road for interconnect societies road. Uniformity Ratio > 0.3 Transverse Ratio > 0.2 Average Lux (Eav) > 8

Road classification a2 road Other main roads carrying mixed traffic like main city streets, arterial roads and throughway roads. High traffic roads in the city, Link roads. Uniformity Ratio > 0.4 Transverse Ratio > 0.33 Average Lux (Eav) > 15

Road classification a1 road Highest category where speed may be expected to go beyond 70-90 Km per hr. Express way, National High Way. Uniformity Ratio > 0.4 Transverse Ratio > 0.33 Average Lux (Eav) > 30

Assessment of street lighting Pole to Pole Distance. Mounting Height of Luminaries. Type of Luminaries and wattage employed. Verification of total Input Power and Power Factor of existing installation. Width Of Carriage Way. Marking of Points on Road as per Nine Point Method. Collecting observation of LUX Levels at designated points. Classifying the Road. A1 Road A2 Road B1 Road B2 Road

Terminology Lux (lm/mtr2) Lux = 𝐿𝑢𝑚𝑒𝑛𝑠 𝐴𝑟𝑒𝑎

Terminology Emin = Minimum Lux Level on Road. Emax = Maximum Lux Level on Road. Eav = Calculated Average Lux as per Nine Point Method ( For Street Lighting). Uniformity Ratio = Emin / Eav Transverse Ratio = Emin / Emax

User tools kit Lux Meter: Laser Distance Meter Power Meter

National Lighting code road Lighting Average Lux Calculation Nine Point Method

Pole 1 Pole 2 (P1) 14.0 Lux (P4) 9.0 Lux (P7) 14.0 Lux (P2) 7.0 Lux (P5) 8.0 Lux (P8) 7.0 Lux (P3) 4.5 Lux (P9) 4.5 Lux (P6) 7.0 Lux P5 4 P2+P4+P6+P8 8 P1+P3+P7+P9 16 Eav = + +

Average Lux Calculation High mast lighting Average Lux Calculation

Area Of Shaded Part: A= 3.14*(R12 – R22) Lumens = Lux X Area (A). Light Power Density (LPD): LPD= Total Wattage Total covered Area Lumens Per Watt (LPW): LPW= Lumens Received By reference Plane Total Wattage Average Lux (Eav) Eav= Lumens Received By reference Plane Total Covered Area

Distance from High Mast Lux Readings Distance from High Mast Lux CalculatedLumen 3.5 144 5539 7 110 12693 10.5 58 11155 14 45 12116 17.5 28 9693 21 23 9732 24.5 16 8000 11 6347 31.5 4577 35 4 2923 Total Lumens Received By reference Plane 82775 lm High Mast Height = 20 Mtr Luminaire Wattage = 200W Luminaire Nos. = 6 Nos.

Calculation Lumens Received By reference Plane = 82775 Lm Covered Area (70 Mtr Diameter) = 3.14 x 35 x 35 = 3847 Sq.Mtr LPD = (200∗ 6 0.95 ) 3847 = 0.33 watt / sqmtr LPW = 82775 (200∗ 6 0.95 ) = 65.4 lm /watt Eav = 82775 3847 = 21.5 Lux (At 70 Mtr Dia.)

Lumen Per Watt The Lumen Per watt is not a significant parameter to compare the performance of LED luminaries. The lumen output of Metal Halide remains the highest at about 125 Lm per watt but it is well excepted that these are most inefficient and thereby are being proposed for replacement with LEDs for the same reason. The comparison on basis of Lumen per Watt may be incorrect requiring additional consideration of UTILIZATION FACTOR.

90% Higher Utilization factor Metal Halide Elektron Light Engine System Efficacy: 95 lm Per watt System Efficacy: 85 lm Per watt Wattage: 800 Watt Wattage: 200 Watt Nos. : 8 Luminaire Nos. : 6 Luminaire Produced Lumen: 6,08,000 Lm Produced Lumen: 1,02,000 Lm Lumens Received By reference Plane: 41,510 Lm Lumens Received By reference Plane: 82,775 Lm Max Lux: 50 lux ( Height 20Mtr) Max Lux: 150 Lux ( Height 20Mtr) Area Covered : 3847 Sqmtr Utilization Factor = 𝐿𝑢𝑚𝑒𝑛𝑠 𝑅𝑒𝑐𝑒𝑖𝑣𝑒𝑑 𝑏𝑦 𝑅𝑒𝑓𝑒𝑟𝑒𝑛𝑐𝑒 𝑝𝑙𝑎𝑛𝑒 𝐿𝑢𝑚𝑒𝑛𝑠 𝑃𝑟𝑜𝑑𝑢𝑐𝑒𝑑 Utilization Factor = 0.068 Utilization Factor = 0.811 90% Higher

Energy Effective lighting systems (part 9) Energy Saving In Lighting is a Top Priority as substantial savings can be achieved. Technology available to ensure trouble free continuous operation. Long Life of LED luminaries with Zero Maintenance can reduce the burden upon Municipality. Selection of Most Efficient Street Lighting Systems- Very Important. Overall Cost Of Ownership Capital Cost Energy Cost Maintenance Cost Evaluation of different solutions meeting the Illumination requirement (as defined by A2/A1/B2/B1), on Cost Of Ownership.

Energy Effective lighting systems (part 9) When upgrading an existing installation, a capital investment is made. An Energy Effective Lighting Systems are that which deliver the promised payback and return on the investment.

Analysis of energy efficient lighting Capital Cost = Complete Lighting Cost + Installation Cost Annual Energy Saving: = (A-B) X Annual operating hour X Energy Rate Here A = Existing System Wattage (kW) B = New System Wattage (kW)

Determine Payback Annual Operating Cost = Annual Energy Cost + Annual Maintenance cost Payback (Years) = 𝐼𝑛𝑖𝑡𝑖𝑎𝑙 𝐶𝑜𝑠𝑡 𝐴𝑛𝑛𝑢𝑎𝑙 𝑂𝑝𝑒𝑟𝑡𝑎𝑖𝑛𝑔 𝑆𝑎𝑣𝑖𝑛𝑔 5 year Cash Flow = [5 (Years) – Payback(Years)] X annual Energy Saving Simple Return On investment (%): = 𝐴𝑛𝑛𝑢𝑎𝑙 𝐸𝑛𝑒𝑟𝑔𝑦 𝑆𝑎𝑣𝑖𝑛𝑔 𝐼𝑛𝑖𝑡𝑖𝑎𝑙 𝐶𝑜𝑠𝑡 x 100

Evaluation of bidders Evaluation with respect of Road Types. Cost of Ownership over 5 year period = Capital Investment + Energy Consumed + Maintenance Cost. Comparison of Bidders with respect to cost of Ownership.

Evaluation of bidders Information required from vendors of Energy Efficient Lighting. Note: Information may be furnished for different Carriage Width Roads. Onsite Maintainable. Yes/No. Overvoltage & Surge Protection. Yes/No. Five Year Optical performance warranty . Yes / No.

Warranties No Exclusion on account of Electrical aberrations like Overvoltage & Surges. Free of cost Replacement period. Lumen Maintenance, i.e. guarantee to exhibit the lux levels on road complying to requirement of NLC within the warranty period.