The document discusses the advantages of LED street lights over traditional lighting options. Some key points covered include: 1) LED lights provide significant energy savings through reduced power consumption and longer lifespan compared to traditional lights. 2) They offer better light quality with uniform light distribution and reduced glare. 3) LED lights are more environmentally friendly as they do not contain mercury or other hazardous materials.

1. LED Street lights:state of the art Dledsproducts1

2. The main reasons why the LED lighting is becoming an important role in the industry can be summarized with the following key factors: Big energysavingreplacingexistingsystemsEnergy saving on newsystemsLife of the newtechnologyReductionof the maintenancecostsBetter light qualityEnvironmentfriendlyFree chooseof the color temperatureHigh electricalsafety and power-onlight immediatelyDetas SpA - divisione DLEDS www.dleds.com info@dleds.com2LED key points

3. Most of the lighting fixtures in our countries are outdated and obsolete.

4. The recovery of energy efficiency appears to be a major factor in the consideration of the LED source as an alternative to the existing one.

5. The use of LED technology in the municipal area can be used for street lighting fixtures but also for lighting road bike paths, walkways, gardens, parks, common areas, parking lots, etc..Detas SpA - divisione DLEDS www.dleds.com info@dleds.com3Recoveryofenergyefficiency on existingsystemsCity – Garda LakeObsolete lightingfixture - Brescia

6. Whenwespeakaboutpercentageenergysavingof the LED fixtureto the standard existinglamp, wemeanhowmuch the new LED light can savegivingas a target the respectof the lighting classof the EN13201.

7. Untilfewtimes ago, the choiceofone light fixtureratherthenanotherwasmadeconsideringaesthetic and performances. Sometimesthischoiceappearsexceeded.

8. If, forexample, sphere light fixtures are replaced ( emitting on 360°) the recoveryof the energyefficientwillbeprobably the max. possible.

9. We can therefore say that the use of LED light fixtures can improve the efficiency between 30 and 70% depending on the individual case.Detas SpA - divisione DLEDS www.dleds.com info@dleds.com4How much you can save in percentage terms by replacing the existing lighting with LED technology?

10. Using LED lights on newsystems can achieveinterestingsavinglevels in considerationof the 2 followingissue: Reductionofonelightingcategorythanksto the high colorimetricindex ( italianlaw UNI11248 )

11. Actualavailabilityof led fixtureswith “real” efficiencyof more then 70 Lm/Watt

12. Whatdoesitmean “efficiencyLm/Watt”?

13. Sincethereis no rules on which information havetoappear on the catalogof the LED streetlightmanufacturers or importers, we assist to a different and sometimesmisleading information..Detas SpA - divisione DLEDS www.dleds.com info@dleds.com52. Energy savings on newsystems

14. The efficiencydeclared in the catalog (forexample 100lm/watt or 5500 lm/watt if the lamphas 55 Leds) isrelatedto the LED efficiency at the JCT of 25°C ( asdeclaredby the manufacturer) or to the lamp in workingconditions ? Detas SpA - divisione DLEDS www.dleds.com info@dleds.com6Making a true compare between LED streetlightsExtractfrom LED manufacturercatalogAppearsclearas the luminousfluxisreferredto the Junctiontemperaratureof 25°C : a conditionnotreal in the actualpractice

15. Hereis the graphicwhichletunderstoodwhich can reallybe the efficiencyof the “system”Detas SpA - divisione DLEDS www.dleds.com info@dleds.com7LED efficiency VS junction temperatureTherefore, the LED efficiencyisinverselyproportionalto the Junction Temperature

16. ItissurelyimportantusingLEDswith high efficiencybutitisalsoimportantthat the lampisequippedwith a goodheatsink so that the Led can keep a high levelofperformances. Anotherimportantfactoris the expectation in the life of the LED and alsohereitisnecessarytoclarify some importantmatters.The life of the LEDsdepends on severalfactors: Kind and Brandof the used LED. On the market are probablythousandsofmanufacturersbutonly some ofthem can guaranteereliability, performance over the time.

17. As the LED isdrivenand heatsinked. The junction temperature is the key tounderstandhow long can work the led.

18. The LED package and whichreliabilityhas the led once mounted on the printedcircuitboard.Detas SpA - divisione DLEDS www.dleds.com info@dleds.com83. Life timeof the LEDExtractfrom LED manufacturercatalog

19. LED life can changefrom 50.000 to more then 100.000 hrsaccordingtowhichkindof led isused and from the junction temperature.

20. The life of the Led fixturedependsnotonly on the abovementionedfactorsbutalso on whichkindof led driver isused and ifadditional electronic circuit are present.

21. A led driver isreliableifitiscertified and if the MTBF isdeclared.Detas SpA - divisione DLEDS www.dleds.com info@dleds.com93. Conclusion

22. The reductionofmaintenancecostsisreferredbasicallyto the life of the LED source, whichwehaveevaluated in 3-6 timesgreaterthen the traditionalsources.

23. The reductionof the maintenanceisalsogivenby the fact the the Led is a cold light, meaningthat the light goingourof the lampiscool. Forthatreasonitattractslessinsects.