Killark KF1L10530 - Supplemental 20KA/10KV Surge Protection is standard for 120-277 VAC models & 10KA/10KV Surge Protection is standard for 347-480 VAC models. Factory Sealed Construction. Crisp White Light for Excellent Color Rendering – Chromaticity 5000 K (CCT) approx. 70 CRI. Energy Savings – High lumens per watt. Long Life – 100,000+ maintenance free hours to 70% initial lumens. Instant On - Including after power interruption. One 3/4” NPT & one M20 entry standard. World Voltage 120 - 277VAC 50/60Hz. Instant On – Including after power interruption. 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 KF1L Series LED floodlights are high quality explosion proof light fixtures. Designed to go into the harshest environments where explosive vapors are present . Killark LED floodlights provide a crisp white light that is great for color rendering. - Class I, Divisions 1 & 2, Groups B, C, D - Class I, Zones 1 & 2, Groups IIB+H2, IIA - Class II, Divisions 1 & 2, Groups E, F, G - Class III, Divisions 1 & 2