Lighting Calculator 簡介

Visually choose your type of LED light fixture, enter parameters such as room dimensions, luminous flux, reflectance, suspension value, etc., and get a fast calculation of the average illuminance level or the quantity of luminaires you need for your indoor lighting projects. Adjust parameters as you wish.
Free app available in English, Spanish and French.

FORMULAS USED IN OUR CALCULATIONS

ROOM INDEX
Formula:
K = (A x B) / (H3 x (A + B))

Where:
A: Room length in m.
B: Room width in m.
H3: Mounting height of the luminaire from the working plane in m.

SUSPENSION FACTOR
Formula:
J = H2 / (H2 + H3)

Where:
H2: Distance between the ceiling and the light source of the luminaire in m.
H3: Distance between the light source of the luminaire and the working plane in m.

REFLECTION FACTORS
The light emitted by the luminaire is partially reflected by the walls of the illuminated room.
The choice of reflection coefficients (in %) is left at the discretion of the user.

PHOTOMETRIC CLASSES
Photometric classes used in this tool are predefined. They match most products available on the market for the same range of devices.

UTILANCE FACTOR
Ratio of the luminous flux received by the reference surface to the sum of the individual total fluxes of the luminaires of the installation. Depending on the suspension factor, the room index, the reflection factors and the photometric classes, we have determined the utilance factor according to the NFC 71-121 standard.

LIGHT LOSS FACTOR
Ratio of the average illuminance on the working plane after a certain period of use of a lighting installation to the average illuminance obtained under the same conditions for a new installation.
In our calculations, we have considered the decrease in lamp flux (due to dirt accumulation on luminaire and room surfaces and lamp depreciation). Thus, we have determined a light loss factor based on recommended practices.

LUMINOUS FLUX
Formula:
F = (E x A x B x D) / (η x Ui)

Where:
E: Illuminance level requested in lux.
A: Room length in m.
B: Room width in m.
D: Light loss factor.
η: Luminaire efficiency (light output ratio).
Ui: Utilance factor.

NUMBER OF LUMINAIRES
Formula:
N = F / f

Where:
N: Number of luminaires.
F: Total luminous flux to be emitted in lumens.
f: Luminous flux to be emitted by a device.

Please note that all results obtained with this app are provided for information only. They are intended to help you in making fast decisions. For projects strictly in accordance with the recommendations, a lighting calculation software based on the photometric files of the selected luminaires should be used.

展開

目前暫不提供Lighting Calculator的APK檔下載，請前往GooglePlay下載。

Lighting Calculator目前暫時不支援從 Google Play 下載，您可以直接在本頁面下載 APK檔。

Lighting Calculator 對我的電腦設備來說安全嗎？

展開

是的，Lighting Calculator 遵循 Google Play 的內容指南，確保您在您的 Android 設備上安全使用。

什麼是XAPK檔案？如果我下載的Lighting Calculator是XAPK檔案怎麼辦？

展開

XAPK是一種檔案擴充格式，單獨的APK檔案和OBB cache assets檔案。 XAPK檔案可以簡單透過手機上的預設安裝器直接下載安裝到Android裝置。 XAPK檔案可以幫助你在手機或平板下載或傳輸大型應用程式時節省很大的資料容量。XAPK檔案甚至可以讓你毫無障礙地下載和安裝受區域限制的應用程式。 XAPK檔案不像APK檔案可以簡單透過手機上的預設安裝器直接下載安裝到Android裝置。APKPure XAPK 安裝器可以透過最方便的方式幫你一鍵安裝和管理Android裝置上的APK和XAPK檔案。具體安裝教學可以透過以下連接查看：https://apkcombo.com/tw/how-to-install/ 而在電腦上只需拖拽XAPK檔案至雷電模擬器中即可。