Global LED-Based Lamps Used in Explosion-Proof Lighting Market By Type (Spot LED Explosion-Proof Lighting, Linear LED Explosion-Proof Lighting, and Portable LED Explosion-Proof Lighting), By Application (Oil, Mining & Steel, Railway, Electricity, and Military & Public Safety), By Region and Key Companies - Industry Segment Outlook, Market Assessment, Competition Scenario, Trends and Forecast 2019-2028