Emegency Lighting Calculator

Quickly estimate BS 5266-style emergency lighting for escape routes, open areas and high-risk tasks. Guidance only – not a substitute for a full lighting design.

1. Describe the space

Add the basic geometry and how the space is used. All values are in metres.

Space type i

Building type i

Room length (m) i

Measured along the main direction of travel.

Please enter a valid length.

Room width (m) i

If the width varies, use a typical or maximum value.

Please enter a valid width.

Mounting / ceiling height (m) i

Typical offices: 2.4–3.0m, warehouses may be higher.

Please enter a valid mounting height.

Escape route complexity i

Number of emergency exits i

Include final exits from the space or floor.

Please enter at least one exit.

Maintained task illuminance (lux) i

Normal lighting level on the working plane.

Please enter a maintained illuminance.

Emergency luminaire to base design on i

You can override the automatic choice if you already know the product family.

Live summary

As you add details, the panel below gives a quick snapshot of what the calculator will use.

Design assumptions

Space type:

Open area / anti-panic

Approx. size:

–

Mounting height:

–

Building type:

Office

Chosen luminaire:

Auto (we’ll recommend)

Exits / complexity:

–

Emergency lighting design summary

Required emergency illuminance (BS 5266): -

Assumed luminaire & max spacing: -

Estimated emergency luminaires required: -

Estimated exit signs required: -

Minimum duration: 3 hours (UK standard)

How we arrived at this result

This calculator uses simplified spacing rules and typical emergency product performance. It is intended as a design aid only and does not replace a full emergency lighting design, photometric calculations, or site-specific risk assessment.

Emegency Lighting Calculator

Design assumptions

Emergency lighting design summary

Suggested Lumenloop emergency solutions