Kirby Harrison is a freelance writer for The Weekly of Business Aviation, Business & Commercial Aviation and others in the Informa publishing chain. Harrison joined the Navy in 1962 and spent 20 years in the service, virtually all of it as a photojournalist, traveling from small islands in the South Pacific to Vietnam to the bombing of the Marine barracks in Lebanon. When Harrison retired from the Navy, he went back to college and graduated in 1971 from Syracuse University with a Bachelor's Degree in Photojournalism. Along the way, he spent two years as a news photographer at the Daily Press & Times Herald in Newport News, Virginia, and three years working for Studio Sebe in Nice, France as a photographer. More recently, before retiring, he worked nearly 20 years for Naval Aviation News.
In the rapidly receding world of incandescent light bulbs, light produced is simply measured in watts. Today, LEDs are becoming the standard, but a number of other bulbs have appeared, with advantages and disadvantages. This expansion required a new means of measuring light, with the lumen (from Latin, meaning light) emerging from a coalition of more than 40 organizations.
