Convert between lumens and watts for incandescent, halogen, CFL and LED lightbulbs.

The power P in watts (W) is equal to the luminous flux ΦV in lumens (lm), divided by the luminous efficacy η in lumens per watt (lm/W):

May 1, 2025 - A comprehensive chart converting Lumens to Watts for LED, incandescent, and halogen lightbulbs, accompanied by a table demonstrating luminous efficacy conversion.

Lumen and watt units represent different quantities, so you can't convert lumens to watts.

October 31, 2023 - Our watts to lumens & lumens to watts conversion chart covers calculations for all bulb types and ranges from 100 lumens to 10000 lumens

September 10, 2024 - When we pay our electricity bill, we are paying for the watts we use. Since we have traditionally used incandescent light bulbs, we are accustomed to using watts as a unit of brightness, but this is incorrect. The measure of the brightness of a light fixture is lumens, not watts.

Learn to compare lumens to watts and how newer LED bulbs and lamps compare to the traditional incandescent, metal halide, and fluorescent lamp wattages.

December 21, 2024 - If you choose a fluorescent light with a light efficiency of 65 lm/W, you will need an approximately 25-watt fluorescent light. ... The lumen requirement forsolar lights varies based on factors like pole height, road width, and ambient light.

Learn how to convert lumens to watts to pick the perfect LED bulb, and boost energy efficiency with helpful tips and detailed conversion charts.

June 27, 2024 - If a light bulb emits 1000 lm and has a luminous efficacy of 20 lm/W, the value in watts will be 1000 lm ÷ 20 lm/W = 50W. ... If you have a 75W incandescent bulb and the lumens per watt value is 15 lm/W, the lumens will be equal to 75W × 15 ...

Example 1: You see an offer for an LED torchiere. The light output is 1800 lumens and you want to know how bright it is compared to an old halogen torchiere. In the calculator you have to select Lumens to Watts as conversion type, enter the ...

The luminous flux ΦV in lumens (lm) is equal to the power P in watts (W), times the luminous efficacy η in lumens per watt (lm/W):

November 29, 2024 - Learn how to convert lumens to watts, choose the right LED bulbs, and maximize energy efficiency with our detailed guide and conversion charts.

For an LED bulb, producing 1,300 lumens will require around 15 watts of power. However, for a less-efficient halogen bulb, over 60 watts of power are likely to be required to produce the same brightness.

Lumen calculator for lumens and watts conversion, quick efficacy checks, and room lumen estimates from area and target illuminance.

July 23, 2024 - How Many Lumens in a Watt? · LED: Lumens = Watts x 80 · CFL: Lumens = Watts x 70 · Halogen: Lumens = Watts x 20 · Incandescent: Lumens = ...

June 15, 2025 - Lumens directly measure the total ... To illustrate, an 800-lumen LED bulb delivers a light output equivalent to a traditional 60-watt incandescent bulb....

March 3, 2025 - In this guide, we’re going to teach you everything you need to know when it comes to converting lumens to watts.

July 21, 2025 - Power (Watt: W) = Voltage (Volt: V) * Amperage (Ampere: A) Lumen is the unit of measurement for luminous flux and describes the brightness emitted by a light source. The higher the lumen, the brighter the light. The luminous flux can be calculated, but as it is much lower in reality, professional manufacturers measure it using sophisticated equipment!