Street Lighting Installation and LED Dimming: An Illustrative Energy Calculation

chi-swear.com
2026-10-16

Workers beside a road luminaire on an elevated work platform, with a blue control device visible above the lamp. — Installation reference from the supplied company image library. Specific model, location, quantity and measured energy savings are not confirmed.

Street lighting installation reference

The supplied installation photograph shows workers using an elevated work platform beside a road luminaire. A blue control device is visible on top of the luminaire. The photograph illustrates a mounting arrangement; the specific controller model, project location, installed quantity and commissioning date have not been independently confirmed.

Illustrative energy calculation: LED dimming

The following calculation is a separate illustrative scenario based on assumptions presented in the 2019 UMELINK solution brochure, pages 14–15. It is not a measured result from the photographed installation.

Assumptions: 10,000 luminaires, 11 operating hours per day, 365 days per year and an illustrative electricity price of RMB 0.86/kWh. The dimmed case assumes a 70 W average input over those operating hours.

Annual result	100 W LED baseline	Assumed 70 W average with dimming
Electricity consumption	4,015,000 kWh	2,810,500 kWh
Electricity cost	RMB 3,452,900	RMB 2,417,030

The calculated annual reduction is 1,204,500 kWh (30%) and RMB 1,035,870. Annual consumption = quantity × average input watts ÷ 1,000 × operating hours. Annual electricity cost = annual consumption × electricity price.

These figures are recalculated from the stated assumptions rather than copied from the brochure’s inconsistent totals. The brochure’s combined 75% claim includes a lamp-replacement comparison and must not be attributed to a receptacle or controller alone.

Applying the example to a project

Actual savings depend on the load, driver dimming response, operating schedule, required illumination, metering boundary and control-system consumption. Confirm electrical compatibility, wiring, orientation and sealing against the applicable installation instructions. Compare measured consumption under equivalent lighting-service conditions before claiming project savings. A receptacle alone does not provide the dimming strategy.

Source: UMELINK SMART LIGHT SOLUTION 2019, pages 14–15 (historical illustrative assumptions; not a current project measurement report). No maintenance-cost or carbon-reduction totals are claimed here.

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وانغ يي

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