Research on the Design and Implementation of LED Lighting Systems under Vacuum and Low-Temperature Conditions
LI Peiyin
LI Qiang
LI Tianshui
DU Chunlin
GUO Ziyin
Abstract：LED lighting fixtures are widely used in various fields due to their advantages of energy efficiency,environmental friendliness,and long lifespan.However,during vacuum-thermal tests in space environment simulators,LED fixtures failed to ignite under vacuum(＜1 × 10-3 Pa)and low-temperature(-196 ℃)conditions.Research revealed that at startup,the junction temperature of the LED was only around 100 K,causing a significant increase in forward voltage,which hindered the ignition of the lamp.To address this issue,this study performed thermal design on the LED fixtures and improved the lighting system's startup circuit,successfully achieving illumination under vacuum and low-temperature conditions.This LED lighting system has been applied in a certain model of vacuum-thermal test in China,effectively expanding the application range of LED light sources and providing reliable lighting support for space environment simulators.
Keywords：LED lightthermal testspace environmentvacuum cryogenic
Publication Date：2025-10-31
Online Publishing Date：2025-11-27(First online date of this platform, not the publication date of the document)
Pages：6( 34-39 )