According to Energy Star, a standard 100-watt incandescent light bulb emits 1,600 lumens of visible light. The luminous efficacy of an incandescent light bulb is set at 16 lumens per 1 watt.
Lumens measure how bright a light bulb is, so it is only important to know how many lumens a bulb produces if the primary lighting concern is brightness. The more lumens a bulb has, the more light it produces and a bulb with fewer lumens produces dimmer light. Lumens do...
A light bulb glows because of heat that is caused by electricity as it flows through a filament within the bulb. As the wire heat up, it glows as the result of the temperature.
According to Union College, an incandescent light bulb operates by acting as the load in an electric circuit. The glass bulb contains a wire which heats up with electrical current, and the heat causes the wire to glow white-hot and emit visible light.
A light's output in lumens can be found by checking the Lighting Facts label prominently displayed on the packaging of most lighting fixtures. If lacking a Lighting Facts label, the output of lumens can be determined through the use of a watts to lumens calculator.
A 100-watt incandescent bulb gives off 1,600 lumens. Watts measure the electrical energy required to light a bulb, while lumens are a measure of the brightness of the light produced.
Although it is commonly believed that Thomas Alva Edison invented the incandescent light bulb, he actually just improved on light bulbs detailed in a 1875 patent he bought from two other inventors, Henry Woodward and Matthew Evans.