Valid

GB/T 48037-2026Measurement methods for the luminance distribution of planar light sources and luminaires (English PDF)

平面光源和灯具的亮度分布测量方法

Preview PDF

This is a limited preview

Buy now to download the full PDF (15 pages)

Need quotation for your management?

Get a formal quotation for GB/T 48037-2026 in 30 minutes.

Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 48037-2026 is the English-translated version of 平面光源和灯具的亮度分布测量方法.

GB/T 48037-2026 is the Chinese standard "Measurement methods for the luminance distribution of planar light sources and luminaires".

Its scope clause reads: This document establishes a method for representing the luminance distribution of light sources and luminaires with planar luminous surfaces, and describes the measurement conditions and measurement...

Measurement equipment and measurement methods. This document applies to lamps, luminaires, modules, and their lighting systems with planar light-emitting surfaces that are powered by AC or DC in laboratories or field applications.

Luminance distribution measurement under the specified conditions. Luminance distribution measurement for other light sources and luminaires shall be performed in the same manner.

This document does not apply to planar light sources and luminaires that primarily emit ultraviolet or infrared radiation. Its clauses include terms and definitions.

Found what you need?

Document preview — GB/T 48037-2026

National Standard of the People's Republic of China

ICS: 17.180.20
Classification: K 70

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Representation of brightness distribution
5.Measurement conditions and measuring equipment 4.
6.Measurement Methods 5.
7.Derivation of parameters for brightness distribution
Appendix A (Informative) Sampling Analysis Based on the Sampling Theorem

1 Scope

This document establishes a method for representing the luminance distribution of light sources and luminaires with planar luminous surfaces, and describes the measurement conditions and measurement...

Measurement equipment and measurement methods.

This document applies to lamps, luminaires, modules, and their lighting systems with planar light-emitting surfaces that are powered by AC or DC in laboratories or field applications.

Luminance distribution measurement under the specified conditions. Luminance distribution measurement for other light sources and luminaires shall be performed in the same manner.

This document does not apply to planar light sources and luminaires that primarily emit ultraviolet or infrared radiation.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

This document.

GB/T 2900.65 Electrical Engineering Terminology - Lighting

GB/T 2014 7.2 Colorimetry - Part 2.CIE Standard Illuminating Bodies

GB/T 20151 Photometry - CIE Physical Photometric System

GB/T 39394 Test methods for LED lamps, LED luminaires and LED modules

3 Terms and Definitions

The terms and definitions defined in GB/T 2900.65 and the following terms and definitions apply to this document.

3.1

A nearly flat and uniformly luminous outer surface.

Note 1.Absolute flatness is an ideal situation. In practical applications, the planar light-emitting surface is macroscopically flat, but there are minute bumps and depressions in some areas, such as surface frosting or texture.

The physical or microstructure; in this document, a luminescent surface with a radius of curvature much larger than the observation distance (e.g., 10 times) is considered a planar luminescent surface.

Note 2.The shape of the planar luminous surface is not limited, including rectangles, circles, rings, polygons and other irregular shapes.

3.2 luminance

Luminosity

Lv;L

The density of luminous intensity at a specified point on an actual or imaginary surface in a specified direction relative to the projected area [see formula (1)].

Lv= dIv cosalpha (1)

In the formula.

Iv --- Luminous intensity;

A --- The area of the luminous surface;

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

How to Download GB/T 48037-2026

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.