How is light output measured?
Traditional incandescent light bulbs are commonly selected upon the wattage (W) indicated on the packaging of the lighting product. An example of this is the purchase of a traditional 60W incandescent bulb, suitable for use in bedrooms and or other small living spaces. The ‘wattage’ of a lighting product refers to the measure of energy input, or energy required for the light to come on – this however, is not a true measure of light. The more accurate measure of light is lumens (lm). Lumens is a measure of light output, the actual intensity of the light that is produced. When selecting a lighting product for your home or office, look for the measure of light output, the amount of lumens the bulb produces. This will assist you in purchasing the light output that best suits the space.
