2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85984We present the results of stability studies of nanosecond light sources based on single quantum well (SQW) InGaN/GaN ultra bright blue LEDs. It is shown that the light yield of such light sources and their timing characteristics don't deteriorate even after 10^10 total pulses. The longterm stability of the sources light yield is better than 1%.16 pages, 7 figuresInstrumentation and DetectorsAstrophysicsHigh Energy Physics - Experimenttext