Jun 03, 2022 You see, blood does not fluoresce by applying UV or visible blue light. What color light is best for blood tracking Blue Blue lightBlue. Blue lightis the most commonly used color used to track blood. But, don&39;t just go rushing out to buy any old blue light. If you pay close attention, the light on blood trail lights is more of a violet hue.. Features Deer Blood Tracking LightUv 20w 365nm Real Black Light, Blood Tracker Gear Specially Designed For Hunting Whitetail Deer Buck Elk, As The Deer See The Red Light Worst, The Green Light Will Attack The Deer, But The Deer See The Blue Light The Best, So We Do Not Use The Blue Light Like Most Others Multicolor Flashlight. Early life. Hancock was born in Chicago, the son of Winnie Belle (n&233;e Griffin), a secretary, and Wayman Edward Hancock, a government meat inspector.His parents named him after the singer and actor Herb Jeffries. He attended Hyde Park High School. Like many jazz pianists, Hancock started with a classical education. He started playing piano when he was seven years old, and.