Best-in-class system efficacy - Up to 137 Lm / W. Universal Voltage: AC120-277V, AC347-480V (50/60Hz). Wide ambient temp. range from - 40°C to + 50 °C ( -40°F ~ + 122°F). Safe and reliable heat transfer - Offering a T-rating of T3C (CID2) / T4A (CIID1). Instant on/off operation. Shock-and vibration-resistant - Durable LEDs with solder-less board connection. Copper-free aluminum body and corrosion resistant.