Is there a relationship between lumen, candlepower, footcandle and lux?
Yes. One lumen per square foot is equal to one footcandle. One lux is equal to one lumen per square meter. One square foot equals 0.0929 square meters. So, one lux equals 0.0929 footcandle and one footcandle is equal to 10.76 lux. What are the four operating characteristics of lighting? The four operating characteristics of lighting are efficiency, lumen maintenance, mortality and color. Efficiency is the light output per unit of power input. Lumen maintenance describes the decrease in light output as the lamp ages. Mortality is the average lamp life expectancy. Color describes how warm or cool a light source is and how it affects the color appearance of people and objects being illuminated. What type of instrument can I use to measure the lighting at my facility? Measuring light levels in your work areas requires the use of a light meter. The instruments transfer the energy of available light into an electrical current. The meter reads the current and calculates the appropriate value
