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Brightness / Light output
What light output would best suit your application?
Traditionally, consumers have selected light bulbs based on wattage: A light bulb for a table lamp might be a somewhat subdued 40-Watt bulb, a ceiling light in a bedroom might be a bright 60-Watt bulb, and an outside house light might be an intense 100-Watt bulb. However, in actuality, relating light output to wattage makes little sense. Wattage is an indicator of how much energy the lamp consumes, not how much light it emits.
So how do you compare lumens to watts even though you can’t technically convert in the same way you can, say, inches to centimeters, since they represent different quantities (luminous flux vs. electric power)? Here’s a handy chart that outlines the relative equivalency of lumens to watts:
