energy efficiency requirements, beginning January 1. Since most people are used to the soft yellowish glow from incandescent light bulbs, ENERGY STAR qualified bulbs that produce light closer to the color of daylight (color temperatures above 3000K) may appear brighter because the color of the light is less yellow. The current 100-watt incandescent bulb is the equivalent of about 1600 lumens. However, this practice has become obsolete as new energy-efficient bulbs entered the market that gives off the same number of lumens (or the brightness level) at a lower wattage.
The color of light may also affect how bright a light appears, even if the lumens are the same. If you want to carry out a conversion from lumens to watts, you can use the following formula: watts lumens (lumens per watt) What is the (lm/W) figure lm/W stands for lumens per watt and is a unit measuring luminous efficacy and energy efficiency - how much visible light is produced for a given amount of electricity. It was common practice to look for the ‘Watts’ before buying a lighting bulb in the past.
You can also look for an ENERGY STAR qualified bulb that is labeled as equivalent to the incandescent bulb you are replacing. To save energy, find the bulbs with the light output you need, and then choose the one with the lowest wattage. Common terms are ‘soft white 60,’ ‘warm light 60,’ and ’60 watt replacement.’ Bulb manufacturers include this information and the equivalent wattage right on the packaging.
Lightbulb brightness in general is measured in lumens (not watts). Lightbulb Watt-to-Lumen conversion chart Watts But the brightness of new CFL and LED lightbulbs are measured in lumens, not watts, so here’s a handy chart to help you do the conversion. We all know how much light a 60-watt bulb will produce.