Selux

To save energy and imp­rove ligh­ting quality, the town’s exis­ting Histo lumi­na­ires by Selux were rep­la­ced using LED upg­rade kits. Not only are the new illu­mi­nants much more effi­ci­ent, they also guaran­tee outs­tan­ding visual com­fort.

Power con­sump­tion – Com­pa­ri­son before and after upg­rade

Situ­ation before the upg­rade:
137 Histo 550 lumi­na­ires are ins­tal­led in the town equ­ip­ped with 100 W high-pres­sure sodium lamps. A 100 W high-pres­sure sodium lamp con­su­mes approx. 114 W along with its bal­last. The lights are in ope­ra­tion the whole night and accor­dingly illu­mi­nate the muni­ci­pa­lity for 4300 hours per year. This cor­res­ponds to an annual power con­sump­tion of 67,157 kWh.

Situ­ation after the upg­rade:
56 Histo 550 lumi­na­ires have been equ­ip­ped with a 72 W LED upg­rade kit and 81 Histo 550 lumi­na­ires with a 46 W-LED upg­rade kit. The lumi­na­ires are lit the entire night, thus illu­mi­na­ting the town for 4300 hours per year. This results in an annual elect­ri­city con­sump­tion of 33,359 kWh, which

cons­ti­tu­tes a saving of 50 per­cent ove­rall.

Costs can also be saved on main­te­nance since the LED module has a much longer ser­vice life than a high-pres­sure sodium lamp, which has an ave­rage life of 25,000 hours.

Com­pa­ri­son of light quality before and after the upg­rade

Situ­ation before the upg­rade:
Colour rep­ro­duc­tion index (R_a = 25) of the orange-colo­ured light of the high-pres­sure sodium lamps is poor, which means colo­urs appear dif­fe­rent than in day­light. The light dazz­les beca­use the lumi­na­ire scat­ters it in all direc­ti­ons.

Situ­ation after the upg­rade:
Much better colour rep­ro­duc­tion (R_a > 70) is atta­ined with the white LED light (3000 K). Lumi­nous inten­sity is con­fi­gu­red accor­ding to the app­li­cable regu­la­ti­ons and stan­dards. Direct glare is also very low and light is direc­ted with high pre­ci­sion. As a result the upg­ra­ded lumi­na­ires reduce light pol­lu­tion while at the same time pro­tec­ting flora and fauna.