LED Blackboard Light


Shanghai Sansi Electronic Engineering Co Ltd

Verify ID:


Expiration date:

October 26, 2020 - October 25, 2021

Verification Mark

Applicable To:

CJSA120 36W

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 Company

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.