Light Pie 4+

Simple Lighting Calculations

Pork Pie Software Limited

Designed for iPhone

    • 2.3 • 3 Ratings
    • $3.99

iPhone Screenshots


Lighting calculations and all supporting theory in the palm of your hand!

Lighting calculations made easy!

As with all our Apps this App provides the underlying maths and theory behind the calculations together with worked examples. This will allow you to not just get an answer, but more more importantly, to understand how the answer was derived.

Light Pie is written to allow you to undertake fundamental lighting calculations with ease. The following three features are available within the App:

Foot-candle Lux:

Upon entering an illuminance level in either Lux or Foot-candles this feature converts the provided value into its corresponding Lux or Foot-candle value.

Installation Lifetime:

Upon entering the luminaire or lamp life together with the installation’s annual operating hours this feature will calculate the installations lifespan, i.e. the time from new until either relamping or new luminaires are required.

Lumen Method:

Upon entering the required illuminance, room area, average luminous flux of the lamp, luminaire utilisation factor, and luminaire maintenance factor, this feature calculates the number of luminaires needed to achieve the required illuminance.

Room Index:

Upon entering the room length, room width, and the luminaries height above the working plane, this feature calculates the Room Index (K).

Maintenance FactorRoom Index:

Upon entering the Lamp Lumens Maintenance Factor (LLMF), the Lamp Survival Factor (LSF), Luminaire Maintenance Factor (LMF), and Room Surface Maintenance Factor (RSMF), this feature calculates the lighting installation Maintenance Factor (MF).

“Written by Engineers for Engineers”

About Pork Pie Software:

Pork Pie Software is a mobile app development company based in New Zealand. Our apps are actually written and coded by real engineers that practice in the engineering area that each app is written in.

All feedback and suggestions are genuinely welcome. As we write our own apps we can quickly update and improve our apps based on your feedback.

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What’s New

Version 2.1

Thanks for using our Light Pie app. We’re constantly improving this app in conjunction with your feedback to make this app even better.

This update includes:

• Updated the Installation Lifetime feature to allow a user configured operating hours profile to be created. The profile is based upon entering your building or applications actual daily operating hours.

If you like the app, please leave us a review!

“Written by Engineers for Engineers”

Ratings and Reviews

2.3 out of 5
3 Ratings

3 Ratings

App Privacy

The developer, Pork Pie Software Limited, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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