Lighting calculation: calculator for a master

Lighting calculation: calculator for a master

Lighting Calculation: A Calculator for Electricians and Specialists

📄 Description

A ready-made Excel calculator for calculating room lighting. Enter the dimensions and room type, and the table automatically calculates how many light fixtures you need, what kind of lighting to choose, and how to position them.

Problems It Solves

Don’t know how many light fixtures you need? The calculator calculates according to SP standards and shows three options: “standard,” “comfort,” and “bright.” Choose based on your client’s preferences.

Your client says, “I want it brighter”? There are three brightness options available. Show the numerical difference, and the discussion becomes substantive.

Unsure which lighting type to choose? The calculator suggests color temperature: warm for the bedroom, cool for the study, and neutral for the living room.

Forgot about night lighting? A separate block reminds you that bedrooms, children’s rooms, hallways, and bathrooms require 3–5 W light fixtures with motion sensors.

Not sure how to position them? The calculator determines the number of rows and the spacing between light fixtures.

Afraid that buyers might break the formulas? Everything is protected. Buyers can only input their own data.

What’s Inside

Area calculation and wattage norms (W/m²) based on room type.

Three brightness options: standard (according to SP), comfort (best for most), bright (for those who prefer brighter lighting).

Number of light fixtures for each option.

Color temperature (warm / neutral / cool) — with explanations for each recommendation.

Night lighting: Recommendations for bedrooms, children’s rooms, hallways, and bathrooms.

Layout scheme: Number of rows and spacing between light fixtures.

Instruction manual (PDF) — how to use the calculator.

Checklist (PDF) — what to verify before installation.

Who Is This For

Electricians – for quick on-site calculations.

Specialists – for coordination with clients.

DIY renovators – to avoid mistakes.

Format

Archive containing an Excel calculator (.xlsx) + instruction manual (PDF) + checklist (PDF). Works in Microsoft Excel and Google Sheets.

Requirements

Simply open the file, enter the dimensions and type of room, and the calculator will handle the rest.