Halco HID Mercury Vapor R40 Bulb, Design Lighting Group, Atlanta, GA Published on October 11, 2017 in Halco Lighting | Design Lighting Group LLCFull resolution (200 × 200) ← Previous Next → Halco HID Mercury Vapor R40 Bulb, Design Lighting Group, Atlanta, GA Halco HID Mercury Vapor R40 Bulb, Design Lighting Group, Atlanta, GA