How does bulb wattage vary with each type of light to get the same light output?
A. As the chart above illustrates, light output (measured in Lumens/watt) varies according to bulb type. Therefore, on average, 1 watt of fluorescent is equivalent to almost 6 watts of incandescent (or 4 watts of halogen). LEDs are available in narrow beam, medium beam, and wide beam; the wider the beam angle, the lower the intensity of light output. Generally it takes between 7-9 LEO’s for adequate reading and task lighting. It can take 20+ LEO’s to equal the light output of a lOW halogen spot (however, it is believed that we could see a 2-fold increase in the intensity of LEDs over the next two years.) Q. There seem to be many different terms used to describe light intensity or light output. What are the differences between these terms and how are they measured? A. Luminous Flux is the total amount of lamp light in all directions and is measured in Lumens. Luminous Intensity is the concentration of light in a particular direction and is measured in Candelas. Luminance is the density
