... low light attenuation.2. Adopting optics grade PMMA materials, high transmittance. 3. Working Temperature:-25°C-45°C ( ... . Lifespan: >50,000 hours.5. High luminous efficacy, optional color temperature, high CRI, good color rendering.6. Impact- ... , office, reading room and other partial illumination.BenefitsSolid-state, high shock/vibration resistantNo RF interference, No buzzing noiseNo fluorescent ...