![]() A bulb will appear to be brighter when its lumen rating is higher.Ī conventional light bulb at home might often emit between 300 to 1000 lumens. Lumens (lm) are a measure of the amount of light from a light source visible to the human eye. Therefore, the measurement that shows the output of light is lumens. This is because the wattage measures the power input of a bulb instead of the light output.īut the light output is what we are looking for when comparing the brightness of light bulbs. But it turns out wattage was not the most proper way to tell how bright a light bulb really shines. The previous method to compare the brightness of light bulbs was wattage. However, all is not gloom in the lighting industry as there’s an easy way to tell the brightness of one light bulb from another. So it became frustrating and confusing to buy light bulb replacements. They simply did not know what lumens mean. These changes were not well understood by most consumers. For example, a 20W LED light bulb would be brighter compared to a conventional 50W light bulb. The energy efficiency of LED light bulbs meant that a higher wattage did not mean that a bulb was brighter. However, when energy-saving lighting emerged and in particular LED lighting, things changed. When using wattage, it was easy to find light bulbs of equal brightness for replacing old or blown up bulbs. For example, an 80W light bulb was brighter than a 30W bulb.
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