Convert lumens to watts with the online converter calculator
Lumens – The SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela.
Watts – Watts is a combination of Amps and volts. Watts is a measurement of the amount of energy being released. The higher the wattage is, the more power and output from the appliance.
Enter the power in watts.
Select the source of light. Eg: Halogen Lamp, LED Lamp.
Click on the calculate button, you will get the Luminous flux results in lumens.
The high luminous efficacy (more lumens per watt) is used by Energy saving lamps.
The luminous flux ΦV in lumens (lm) is equal to the power P in watts (W), n times the luminous efficacy in lumens per watt (lm/W):
ΦV(lm) = P(W) / η(lm/W)
Where,
P (W) = Power in Watts
ΦV (lm) = Luminous flux in Lumens
η (lm/W) = Luminous Efficacy in Lumens per Watt.
For LED lamp with luminous efficacy in lumens per watt: 90 lm/W
20 Watts to lumen = 1800 lm
40 Watts to lumen = 3600 lm
50 Watts to lumen = 4500 lm
90 Watts to lumen = 8100 lm
288 Watts to lumen = 25920 lm
450 Watts to lumen = 40500 lm
1800 Watts to lumen = 162000 lm
| Power in watts | Light source | Efficacy | Result in (lm) |
|---|---|---|---|
| 30 | Tungsten incandescent light bulb | 15 | 450 |
| 30 | Halogen lamp | 20 | 600 |
| 30 | Fluorescent lamp | 60 | 1800 |
| 30 | LED lamp | 90 | 2700 |
| 30 | Metal halide lamp | 87 | 2610 |
| 30 | High-pressure sodium vapor lamp | 117 | 3510 |
| 30 | Low-pressure sodium vapor lamp | 150 | 4500 |
| 30 | Mercury vapor lamp | 50 | 1500 |
| 40 | Tungsten incandescent light bulb | 15 | 6000 |
| 50 | Halogen lamp | 20 | 1000 |
| 60 | Fluorescent lamp | 60 | 3600 |
| 70 | LED lamp | 90 | 6300 |
| 80 | Metal halide lamp | 87 | 6960 |
| 90 | High-pressure sodium vapor lamp | 117 | 10530 |
| 100 | Low-pressure sodium vapor lamp | 150 | 15000 |
| 110 | Mercury vapor lamp | 50 | 5500 |
