... .Use Taiwan brand chip LED, low light attenuation;5. Isolated constant current power supply, security and stability. Technical parameter: ... : 960LMPower factor: 0.6Beam angle: 80degPower efficiency:75%Light efficiency: 80LM/WAmbient temperature: -30°C~55°CCRI: ... , office, commercial building, office building, desk lamp lighting and stair lighting2.Apply to municipal lighting, bank, infrastructure, gym ...