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):

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):

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.

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

If you need to convert lm to watts, for example, an LED bulb, the formula can be rearranged as Watts = Lumens / 80. ... This means a 100-watt LED bulb would produce approximately 8,000 lumens. For comparison, a traditional incandescent bulb consuming the same power would only generate about ...

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

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 ...

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

October 31, 2023 - Our lumens to watts conversion chart below simplifies the correlation between these two light measurements, ranging from 100 to 10,000 lumens.

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.

July 23, 2024 - Therefore, a 100-watt incandescent bulb is roughly equivalent to a 15–18-watt LED bulb in terms of light output, providing substantial energy savings. The required lumen output varies depending on the purpose of the room.

April 16, 2018 - LED Wattage CFL Wattage Halogen Wattage Lumens 6W 12W 40W 700 lm 9W 15W 60W 900 lm 12W 20W 70W 1,300 lm If you have recently purchased a light bulb, you may have noticed a switch

The table below clearly shows the number of lumens that are generated by different types of bulbs at various wattages.

July 19, 2024 - For a kitchen requiring 3,500 lumens using a 10-watt LED bulb: Number of Bulbs = 3500/800 ≈ 5 · Total Wattage = 5*10 watts = 50 watts · If these bulbs are used for 5 hours a day: Daily Cost = 50*5/1000*0.12 = $0.03 · Monthly Cost = 0.03*30 ...

March 3, 2025 - Conclusion: By switching to LED bulbs, you can achieve the desired 3,000 lumens while saving 170 watts of energy!

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!

June 15, 2025 - Keep in mind that actual wattage may vary slightly depending on the specific brand and model of the bulb, so it's always a good idea to check the manufacturer's specifications.​ ... Please pay attention that the above values ​​are approximate. It may vary depending on several factors, such as brand, type and bulb age. However, the lumens to watts chart is a reliable reference to understand the relationship between lumens and watts.

December 21, 2024 - Suitable for using 50-70 watt LED lamps, providing approximately 5,000 to 10,500 lumens of luminous flux. ... Suitable for using 30-50 watt LED lamps, providing approximately 3,000 to 7,500 lumens of luminous flux.