When evaluating an LED Lights Test Box, prioritize high-precision power meters that can measure Voltage (V), Current (A), Power (W), Power Factor (PF), and Annual Energy Consumption. Ensure the device supports a wide voltage range (85V-265V) to accommodate international standards. For testing diverse lamp types, the box should feature multiple socket interfaces such as E27, E14, B22, GU10, and universal AC outlets. Additionally, look for models with dimming control functions to test the stability of dimmable LED drivers.