... , tempered glass Protection grade: IP60 Life expectancy: 5 years Effective light: 150 / P1m / w, respectively, could be saving 90%, ... 3. Bryant High efficacy electrodeless lamp, more energy than other light sources. Characteristics: Long-life: average life expectancy of 100,000 ... and less than 3% change in power to ensure constant light output. Environmental adaptability in -60 ~ +260 normal work ...