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The formula to calculate Watts (W) from Lumens (lm) is:
\[ P (\text{W}) = \frac{\Phi_v (\text{lm})}{\eta (\text{lm/W})} \]
Where:
Lumen (lm) is a unit of luminous flux, representing the total amount of light emitted by a source. Watt (W) is a unit of power. The conversion from lumens to watts depends on the luminous efficacy, which is the number of lumens produced per watt of electrical power consumed.
Let's assume the following values:
Using the formula:
\[ P = \frac{1000}{80} \]
\[ P = 12.5 \text{ W} \]
The Power (W) is 12.5 W.
| Lumens (lm) | Watts (W) | Luminous Efficacy (lm/W) |
|---|---|---|
| 100 | 1.333 | 75 |
| 200 | 2.667 | 75 |
| 300 | 4.000 | 75 |
| 400 | 5.333 | 75 |
| 500 | 6.667 | 75 |
| 600 | 8.000 | 75 |
| 700 | 9.333 | 75 |
| 800 | 10.667 | 75 |
| 900 | 12.000 | 75 |
| 1000 | 13.333 | 75 |
| 1100 | 14.667 | 75 |
| 1200 | 16.000 | 75 |
| 1300 | 17.333 | 75 |
| 1400 | 18.667 | 75 |
| 1500 | 20.000 | 75 |
| 1600 | 21.333 | 75 |
| 1700 | 22.667 | 75 |
| 1800 | 24.000 | 75 |
| 1900 | 25.333 | 75 |
| 2000 | 26.667 | 75 |
| 2100 | 28.000 | 75 |
| 2200 | 29.333 | 75 |
| 2300 | 30.667 | 75 |
| 2400 | 32.000 | 75 |
| 2500 | 33.333 | 75 |
| 2600 | 34.667 | 75 |
| 2700 | 36.000 | 75 |
| 2800 | 37.333 | 75 |
| 2900 | 38.667 | 75 |
| 3000 | 40.000 | 75 |
| 3100 | 41.333 | 75 |
| 3200 | 42.667 | 75 |
| 3300 | 44.000 | 75 |
| 3400 | 45.333 | 75 |
| 3500 | 46.667 | 75 |
| 3600 | 48.000 | 75 |
| 3700 | 49.333 | 75 |
| 3800 | 50.667 | 75 |
| 3900 | 52.000 | 75 |
| 4000 | 53.333 | 75 |
| 4100 | 54.667 | 75 |
| 4200 | 56.000 | 75 |
| 4300 | 57.333 | 75 |
| 4400 | 58.667 | 75 |
| 4500 | 60.000 | 75 |
| 4600 | 61.333 | 75 |
| 4700 | 62.667 | 75 |
| 4800 | 64.000 | 75 |
| 4900 | 65.333 | 75 |
| 5000 | 66.667 | 75 |
| 5100 | 68.000 | 75 |
| 5200 | 69.333 | 75 |
| 5300 | 70.667 | 75 |
| 5400 | 72.000 | 75 |
| 5500 | 73.333 | 75 |
| 5600 | 74.667 | 75 |
| 5700 | 76.000 | 75 |
| 5800 | 77.333 | 75 |
| 5900 | 78.667 | 75 |
| 6000 | 80.000 | 75 |
| 6100 | 81.333 | 75 |
| 6200 | 82.667 | 75 |
| 6300 | 84.000 | 75 |
| 6400 | 85.333 | 75 |
| 6500 | 86.667 | 75 |
| 6600 | 88.000 | 75 |
| 6700 | 89.333 | 75 |
| 6800 | 90.667 | 75 |
| 6900 | 92.000 | 75 |
| 7000 | 93.333 | 75 |
| 7100 | 94.667 | 75 |
| 7200 | 96.000 | 75 |
| 7300 | 97.333 | 75 |
| 7400 | 98.667 | 75 |
| 7500 | 100.000 | 75 |
| 7600 | 101.333 | 75 |
| 7700 | 102.667 | 75 |
| 7800 | 104.000 | 75 |
| 7900 | 105.333 | 75 |
| 8000 | 106.667 | 75 |
| 8100 | 108.000 | 75 |
| 8200 | 109.333 | 75 |
| 8300 | 110.667 | 75 |
| 8400 | 112.000 | 75 |
| 8500 | 113.333 | 75 |
| 8600 | 114.667 | 75 |
| 8700 | 116.000 | 75 |
| 8800 | 117.333 | 75 |
| 8900 | 118.667 | 75 |
| 9000 | 120.000 | 75 |
| 9100 | 121.333 | 75 |
| 9200 | 122.667 | 75 |
| 9300 | 124.000 | 75 |
| 9400 | 125.333 | 75 |
| 9500 | 126.667 | 75 |
| 9600 | 128.000 | 75 |
| 9700 | 129.333 | 75 |
| 9800 | 130.667 | 75 |
| 9900 | 132.000 | 75 |
| 10000 | 133.333 | 75 |