L48T8-XYY-17P-PW-EM, with X - CRI (color rendering index); YY - CCT (correlated color temperature); W - Client code
Over 90 minutes back-up working time with at least 400 lumen output
The battery is conditioned before testing and the battery terminal voltage (BTV) for the specified discharging time is recorded. The lighting load is powered at the recorded BTV and the luminous flux of the sample is measured according to the appropriate IES standard for the light source under test.
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.