Ethnicity: Irish (paternal grandmother), English, some German, distant Welsh. Gregory Peck was an American actor. His paternal grandmother was Irish. His other ancestry is English, some German, and distant Welsh.atherine Ashe was born in County Kerry, Ireland. Gregoryâs maternal grandparents were John Daggett Ayers II (the son of William Henry Ayers and Elizabeth Maria Daggett) and Kathryn Elizabeth Forse/Force (the daughter of Albert Thomas Forse and Catherine Woodruff).
The length of a fluorescent light bulb is measured from the back of the socket on one end of the bulb to the back of the socket on the other end. The bulbs are labeled according to the diameter and the length. Linear tubes range in length from 6 to 96 inches and fit into slightly longer fixtures.
A fluorescent lamp converts electrical energy into useful light much more efficiently than incandescent lamps. The typical luminous efficacy of fluorescent lighting systems is 50â100 lumens per watt, several times the efficacy of incandescent bulbs with comparable light output. fluorescent lamp or a fluorescent tube is a low pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor which produces short-wave ultraviolet light that then causes a phosphor coating on the inside of the bulb to glow.