Luminous flux in lumens (lm) to electric power in watts (W) calculator.
Enter the luminous flux in lumens, luminous efficacy in lumens per watt and press the Calculate button to get the power in watts:
* the predefined luminous efficacy values are typical / average values.
So 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).
P(W) = ΦV(lm) / η(lm/W)
So
watts = lumens / (lumens per watt)
or
W = lm / (lm/W)
What is the power consumption of a lamp that has luminous flux of 800 lumens and luminous efficacy of 25 lumens per watt (lm/W)?
P = 800 lm / 25 lm/W = 53 W
What is the power consumption of a lamp that has luminous flux of 1100 lumens and luminous efficacy of 15 lumens per watt (lm/W)?
P = 1100 lm / 15 lm/W = 73 W
What is the power consumption of a lamp that has luminous flux of 1400 lumens and luminous efficacy of 15 lumens per watt (lm/W)?
P = 1400 lm / 15 lm/W = 93 W
What is the power consumption of a lamp that has luminous flux of 1900 lumens and luminous efficacy of 15 lumens per watt (lm/W)?
P = 1900 lm / 15 lm/W = 126 W
What is the power consumption of a lamp that has luminous flux of 2000 lumens and luminous efficacy of 15 lumens per watt (lm/W)?
P = 2000 lm / 15 lm/W = 133 W
| Lumens | Incandescent light bulb (watts) |
Fluorescent / LED (watts) |
|---|---|---|
| 375 lm | 25 W | 6.23 W |
| 600 lm | 40 W | 10 W |
| 900 lm | 60 W | 15 W |
| 1125 lm | 75 W | 18.75 W |
| 1500 lm | 100 W | 25 W |
| 2250 lm | 150 W | 37.5 W |
| 3000 lm | 200 W | 50 W |
Our Lumens to watts Calculator allows the users to Calculate Lumens to watts . Some of the prominent features of this utility are explained below.
You don’t need to go through any registration process to use the Lumens to watts Calculator. Using this utility, users to Calculate Lumens to watts as many times as you want for free.
This Lumens to watts Calculator offers users the fastest Calculate. Once the user enters the Lumens to watts values in the input field and clicks the Calculate button, the utility will start the conversion process and return the results immediately.
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