The old days of choosing light bulbs by wattage are over. With today’s modern LED bulbs, we instead need to focus on lumens. But what is a lumen? We’ll explain that, and then you can use our lumens to watts conversion chart to select the right LED bulb every time. ...
Note the units of lumens and watts when performing these conversions which also use the luminous efficacy by "eta" η. The EngineeringToolBox also offers methods of calculating illuminance and illumination for standards of light bulbs and lamps alongside a lux measurement chart. Illumination ...