How is payback calculated?
From measured or metered energy use, new luminaire power, operating hours, tariff and maintenance savings. The assumptions are listed so that they can be reviewed.
Lighting services
LED Retrofit & Energy Audits
Survey, measurement, luminaire-by-luminaire replacement plans and payback analysis for LED conversion.
01Overview
Supply and engineering from one team
Powersense surveys the existing installation, calculates the replacement and supplies ALKAN® LED luminaires and controls, so the savings are shown before an order is placed.
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02Scope and process
Engineering scope and deliverables
- 01
Survey and inventory
Luminaire types, quantities, mounting heights, operating hours and condition are recorded.
DeliverableLuminaire inventory - 02
Measurement
Illuminance is measured on site, and energy consumption is recorded or metered.
DeliverableMeasurement report - 03
Replacement design
Each fitting is replaced to meet EN 12464-1 or EN 13201, and the new layout is calculated in DIALux.
DeliverableReplacement schedule, calculation report - 04
Controls upgrade
Sensors, dimming and wireless control are added where they pay back.
DeliverableControl proposal - 05
Savings and payback
Energy, maintenance and CO₂ effects are calculated with stated assumptions (EN 15193-1).
DeliverableSavings and payback report - 06
Supply and implementation
Supply and phased installation are planned around operations, and the removal of old fittings is coordinated.
DeliverableImplementation plan
03Standards
International standards applied
These standards form the technical basis for design and equipment selection. The exact set is confirmed for each project against the national regulations in force.
- EN 12464-1Lighting of indoor workplaces: illuminance, uniformity, glare (UGR) and colour rendering.
- EN 13201-2Road lighting: performance requirements for lighting classes.
- EN 15193-1Energy performance of buildings: energy requirements for lighting and the LENI indicator.
- IEC 62386DALI, the digital addressable lighting interface: communication, control gear and control devices.
- IEC 60598-1Luminaires: general requirements and tests for safety.
- IEC 62471Photobiological safety of lamps and lamp systems.
04Products
Products we supply
- ALKAN® LED luminaires matched fitting for fitting
- LED tubes and retrofit options
- Sensors and dimming
- Wireless control
05Project types
Typical project types
- Industrial halls and warehouses
- Street and municipal lighting
- Offices, hotels and retail
- Car parks and outdoor areas
06Technical notes
Technical notes and FAQ
Is a like-for-like wattage replacement enough?
No. Light output, distribution and glare must still meet the standard, so each replacement is checked in DIALux and not selected by wattage.
07Keep exploring
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DALI-2, KNX and wireless lighting control: strategy, hardware, programming and commissioning.
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Industrial & High-Bay Lighting
High-bay and linear Alkan luminaires for factories, warehouses and logistics.
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