En­ergy ef­fi­cient street light­ing a first

DEMM Engineering & Manufacturing - - NEWS -

HAMIL­TON AND WAIKATO driv­ers and res­i­dents are the first in New Zealand to ex­pe­ri­ence unique warmer street­lights that re­duce spillover glare into houses, are less harsh on the eyes and more en­ergy ef­fi­cient. Over 15,000 new street lu­mi­naires have been cus­tom- made by Philips for Hamil­ton and the Waikato’s con­di­tions, with half al­ready in place and the rest be­ing in­stalled by the end of the year.

While nu­mer­ous dis­tricts through­out New Zealand have re­placed older HID lights with LEDs, Hamil­ton and Waikato are the first to spec­ify a 3000 Kelvin lu­mi­naire which pro­vides an at­mo­spheric form of ‘warm white’ light­ing. This is a less harsh and more wel­com­ing light com­pared to the more com­mon 4000 Kelvin LEDs which pro­duce a cooler blue- white light sim­i­lar to day­light.

As a fast- grow­ing city, many of Hamil­ton’s ma­jor ar­te­rial roads lie in res­i­den­tial ar­eas with high hous­ing den­sity. The light­ing must both pro­vide safety for driv­ers while not spilling over into peo­ple’s homes. In ad­di­tion, New Zealand street light poles are of­ten more spaced out than those in other coun­tries so light has to reach be­tween poles but not out­wards or up­wards to­wards homes.

The NZD7.2 mil­lion project, funded by the NZ Trans­port Agency with con­tri­bu­tions from Waikato District and Hamil­ton City Coun­cils, cov­ers all roads through­out the coun­cil ar­eas and is sched­uled for com­ple­tion in De­cem­ber.

It is be­ing man­aged by the In­fra­struc­ture and Waikato Al­liances, a strate­gic part­ner­ship be­tween the coun­cils and Downer, with Cory’s sup­ply­ing 16,000 Philips ‘Road Grace’ lu­mi­naires. Over 9,300 ex­ist­ing lights will be up­graded on the two coun­cil’s P cat­e­gory res­i­den­tial roads and 5700 along higher vol­ume V cat­e­gory roads.

The new LEDs fit into ex­ist­ing street light poles and in­fra­struc­ture, are more en­ergy ef­fi­cient and re­quire less main­te­nance, with Hamil­ton ex­pect­ing to save NZD250,000 in re­duced power and main­te­nance costs in the first year, and al­most NZD550,000 in 2019/20.

Shaun Peter­son, Op­er­a­tions Man­ager for In­fra­struc­ture Al­liance, said Philips has de­vel­oped a highly in­no­va­tive lu­mi­naire which of­fered the best light­ing spread for [our] in­creas­ingly high- den­sity city where even the busier V cat­e­gory roads have sig­nif­i­cant street front hous­ing.

For this project Philips also de­vel­oped a new form of stream­lined, 100 per­cent re­cy­clable card­board pack­ag­ing to ship the 16,000 units, which will save the Coun­cils an es­ti­mated NZD40,000 in dis­posal fees.

Sev­eral tech­ni­cal en­hance­ments were in­tro­duced to man­age light pol­lu­tion. The lu­mi­naire’s out­put can be ad­justed man­u­ally on in­di­vid­ual poles with­out an ex­pen­sive Con­trol Man­age­ment Sys­tem. A nar­row band am­ber light is be­ing de­vel­oped for light sen­si­tive zones like the Hamil­ton Ob­ser­va­tory, which was once out­side the city’s lim­its but is now much closer to lit res­i­den­tial ar­eas.

Philips is cur­rently de­sign­ing cus­tomised walk­way light­ing which min­imises light spill into neigh­bour­ing houses from ad­ja­cent poles.

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