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Office lighting energy saving calculator

Office lighting energy saving calculator

Estimate annual kWh saving, running-cost reduction, CO2 reduction and simple payback when upgrading office lighting to LED.

Start Savings Calculation Calculator Suite
Current load LED load kWh saving Payback
Project brief

LED Upgrade ROI Calculator

Use this calculator when the user already wants to understand energy, carbon and payback from an office LED upgrade.

This sets the recommended light level automatically so the user does not need to know it.
Approximate office floor area.
2.5 m UK average if the exact ceiling height is unknown.
Used to estimate current W/m2 before LED upgrade.
Adjusts the artificial lighting allowance.
Use a typical panel or linear fitting if unknown.
Used for LED running cost and ROI estimate.
Allows for light loss over time. Lower factors need more initial lumens.
Used only for a rough payback estimate.
Early-stage guide only. Final office specification still depends on layout, reflectance, ceiling detail, spacing, glare, optics, emergency provision and control strategy.
Office lighting answer

Ready to calculate an office result.

Enter the workplace assumptions, then calculate the likely LED load, annual energy reduction and running-cost saving.

Annual energy reduction
--%

No result has been calculated yet.

Office lighting results will appear here after calculation, including required lux, lumen target, estimated LED load and annual energy saving.
Recommended target
--

Set by the selected office context.

Light required
--

Area, target lux and ceiling-height allowance.

Estimated LED load
--

Indicative load from the LED scheme.

Annual energy saving
--

Against the selected existing lighting type.

Energy comparison

Existing lighting versus LED scheme.

The calculated comparison will show the existing load, the proposed LED load and the likely saving pattern.

Annual cost saving
--

Based on the selected hours per day, days per week and electricity tariff.

Current annual cost
--

Estimated from existing W/m2.

LED annual cost
--

Estimated from LED fitting load.

Saving rate
--%

Reduction against current annual energy use.

See which products are most suitable.

Jump straight to the matched selection instead of hunting for it further down the page.

See which products are most suitable
Energy savings visual
Current annual energy versus the LED scheme.
Values shown in kWh/yr. Carbon is shown separately as tonnes CO2/yr.
Current annual energy (kWh/yr)--
LED annual energy (kWh/yr)--
Annual energy saved (kWh/yr)--
Indicative fittings
--

Rounded up from the calculated lumen requirement.

Spacing guide
--

Indicative centres for an even layout.

CO2 reduction
--

Annual estimate shown as tonnes of CO2 per year, using 0.233 kg CO2 per kWh.

Payback estimate
--

Based on the entered installed fitting cost.

Maintenance factor
--

Included in the lumen requirement.

Balanced product selection

Suggested products to review next.

The selection keeps the result moving by showing the most suitable fitting types side by side before final specification.

Browse Product Ranges
Reference targets
Use the right office baseline before selecting the fitting.
Desks

Workstation areas commonly start around 500 lux, with careful review of screen use, glare and uniformity.

Meeting

Meeting rooms often need comfortable general lighting, flexible controls and a scheme that can support presentation use.

Support

Breakout, reception and circulation zones can use lower targets, but should still coordinate emergency provision and controls.

Specification support

Review the office brief with Lumenloop.

The calculator generates an office enquiry pathway with area, recommended light level, output load, energy saving estimate and a suitable review option. Use it to support product selection when the brief is ready for specification.

Email codes for quote Commercial Downlights
Related specification paths

Related product and specification pages.

Related pages cover product families, controls, emergency options and project requirements.

Commercial upgrades Use savings estimates to plan replacement works. Office lighting Connect energy planning to workplace product selection. Lighting controls Add occupancy, daylight or wireless control options. LED panel lighting Review office panel choices for replacement schemes. Emergency lighting Include emergency provision in upgrade planning. Specification support Send the result with quantities and existing fitting details.