Killark MBL4530A2GLG - Supplemental 20KA/10KV Surge Protection is standard for 120-277 VAC models & 10KA/10KV Surge Protection is standard for 347-480 VAC. Compact in Size with Traditional Industrial Appearance and Suitability. Wide variety of optics including globes, globes with reflectors, all-glass refractors, and spintop refractors. Optional Mounting arrangements including Pendant, Wall, Ceiling, and Stanchion. MBL LED Housings can be retrofitted to existing MB splice boxes to upgrade from Fluorescent or HID. Energy Savings – Less than 50 Watts of Power, 25 Watts for MBL2230. Long Life up to 100,000+ maintenance free hours to 70% initial lumens. Crisp White Light for Excellent Color Rendering - Chromaticity 5000°K (CCT) 70 CRI. Ambient suitability -40°C to 40°C (to 55°C for 14W to 22W). Instant on – Including after power interruption. World Voltage 120-277VAC 50/60Hz. Solder-LESS LED Board Connections – Vibration Resistant. LM80-08 Measurement of lumen maintenance for LED light sources. LM79-08 Certified “Absolute” Photometry, including Chromaticity Color for Solid State Lighting. L70 Values - Industry Nomenclature for Hours of use to 70% of Initial Lumens (TM-21+ Cal.) The MBL Series is a compact low bay energy efficient LED. The design of the MBL makes it suitable for harsh and hazardous environments using a cast copper-free aluminum. Its low profile and compact design allow the MBL to fit in areas where larger fixtures would not fit while still supplying high quality illumination. - Class I, Division 2, Groups A, B, C, D - Class I, Zone 2, Groups IIC, IIB, IIA - Class II, Divisions 1 & 2, Groups E, F, G - Class III, Divisions 1 & 2