LED Blackboard Light


Shanghai Sansi Electronic Engineering Co Ltd

Verify ID:


Expiration date:

October 26, 2020 - October 25, 2021

Verification Mark

Applicable To:


Marketing Claim Verified by UL

Illumination uniformity for classroom writing board light greater than 0.8

Verification Method

In accordance with Annex A.4 of China Shanghai (provincial) testing standard DB31/T 539-2020, Lighting design specification of classroom of middle and primary school and kindergarten, the illumination was measured in a 4m x 1.2m rectangle plane. The rectangle was divided into 30 small squares (0.4m x 0.4m). The illumination for each small square was measured and the illumination uniformity was calculated as the minimum illumination divided by the average illumination.

About the Manufacturer

SANSI Technology: A Global Leader in LED Displays and Lighting Since its founding in 1993, SANSI has been dedicated to technological innovation in a wide range of LED applications, from commercial displays to home lighting. We fully integrate product design, production, sales, installation, and customer support in our effort to provide affordable, state-of-the-art LED technology. With over 480 in-house engineers, 2000 employees, and three advanced factories, SANSI has reached over 40 nations on five continents, and continues to grow. Having successfully launched dozens of cutting-edge projects, SANSI’s mission is to raise the bar for LED applications.

What is UL Verification?

UL Verification is an objective, science-based assessment that confirms the accuracy of marketing claims. Our independent assessment process scrutinizes the validity of specific advertising or promotional statements, giving you a way to separate verified fact from fiction.