The formula to calculate the Light Sum (\(µmol m^{-2}\)) from Light Intensity (\(µmol m^{-2} s^{-1}\)) and Duration (hours) is:
\[ Light\ Sum = Light\ Intensity \times Duration \times 3600 \]
Where:
Light Sum is the total amount of light received over a period of time, measured in µmol m⁻².
Light Intensity is the amount of light per unit area per second, measured in µmol m⁻² s⁻¹.
Duration is the time period over which the light is measured, in hours.
Let's assume the following values:
Using the formula:
\[ Light\ Sum = 500 \times 10 \times 3600 \]
Evaluating:
\[ Light\ Sum = 18000000 \]
The Light Sum is 18,000,000 µmol m⁻².
| Light Intensity (µmol m⁻² s⁻¹) | Duration (hours) | Light Sum (µmol m⁻²) |
|---|---|---|
| 100 | 1 | 360,000.0000 |
| 100 | 2 | 720,000.0000 |
| 100 | 3 | 1,080,000.0000 |
| 100 | 4 | 1,440,000.0000 |
| 100 | 5 | 1,800,000.0000 |
| 100 | 6 | 2,160,000.0000 |
| 100 | 7 | 2,520,000.0000 |
| 100 | 8 | 2,880,000.0000 |
| 100 | 9 | 3,240,000.0000 |
| 100 | 10 | 3,600,000.0000 |
| 100 | 11 | 3,960,000.0000 |
| 100 | 12 | 4,320,000.0000 |
| 100 | 13 | 4,680,000.0000 |
| 100 | 14 | 5,040,000.0000 |
| 100 | 15 | 5,400,000.0000 |
| 100 | 16 | 5,760,000.0000 |
| 100 | 17 | 6,120,000.0000 |
| 100 | 18 | 6,480,000.0000 |
| 100 | 19 | 6,840,000.0000 |
| 100 | 20 | 7,200,000.0000 |
| 100 | 21 | 7,560,000.0000 |
| 100 | 22 | 7,920,000.0000 |
| 100 | 23 | 8,280,000.0000 |
| 100 | 24 | 8,640,000.0000 |
| 200 | 1 | 720,000.0000 |
| 200 | 2 | 1,440,000.0000 |
| 200 | 3 | 2,160,000.0000 |
| 200 | 4 | 2,880,000.0000 |
| 200 | 5 | 3,600,000.0000 |
| 200 | 6 | 4,320,000.0000 |
| 200 | 7 | 5,040,000.0000 |
| 200 | 8 | 5,760,000.0000 |
| 200 | 9 | 6,480,000.0000 |
| 200 | 10 | 7,200,000.0000 |
| 200 | 11 | 7,920,000.0000 |
| 200 | 12 | 8,640,000.0000 |
| 200 | 13 | 9,360,000.0000 |
| 200 | 14 | 10,080,000.0000 |
| 200 | 15 | 10,800,000.0000 |
| 200 | 16 | 11,520,000.0000 |
| 200 | 17 | 12,240,000.0000 |
| 200 | 18 | 12,960,000.0000 |
| 200 | 19 | 13,680,000.0000 |
| 200 | 20 | 14,400,000.0000 |
| 200 | 21 | 15,120,000.0000 |
| 200 | 22 | 15,840,000.0000 |
| 200 | 23 | 16,560,000.0000 |
| 200 | 24 | 17,280,000.0000 |
| 300 | 1 | 1,080,000.0000 |
| 300 | 2 | 2,160,000.0000 |
| 300 | 3 | 3,240,000.0000 |
| 300 | 4 | 4,320,000.0000 |
| 300 | 5 | 5,400,000.0000 |
| 300 | 6 | 6,480,000.0000 |
| 300 | 7 | 7,560,000.0000 |
| 300 | 8 | 8,640,000.0000 |
| 300 | 9 | 9,720,000.0000 |
| 300 | 10 | 10,800,000.0000 |
| 300 | 11 | 11,880,000.0000 |
| 300 | 12 | 12,960,000.0000 |
| 300 | 13 | 14,040,000.0000 |
| 300 | 14 | 15,120,000.0000 |
| 300 | 15 | 16,200,000.0000 |
| 300 | 16 | 17,280,000.0000 |
| 300 | 17 | 18,360,000.0000 |
| 300 | 18 | 19,440,000.0000 |
| 300 | 19 | 20,520,000.0000 |
| 300 | 20 | 21,600,000.0000 |
| 300 | 21 | 22,680,000.0000 |
| 300 | 22 | 23,760,000.0000 |
| 300 | 23 | 24,840,000.0000 |
| 300 | 24 | 25,920,000.0000 |
| 400 | 1 | 1,440,000.0000 |
| 400 | 2 | 2,880,000.0000 |
| 400 | 3 | 4,320,000.0000 |
| 400 | 4 | 5,760,000.0000 |
| 400 | 5 | 7,200,000.0000 |
| 400 | 6 | 8,640,000.0000 |
| 400 | 7 | 10,080,000.0000 |
| 400 | 8 | 11,520,000.0000 |
| 400 | 9 | 12,960,000.0000 |
| 400 | 10 | 14,400,000.0000 |
| 400 | 11 | 15,840,000.0000 |
| 400 | 12 | 17,280,000.0000 |
| 400 | 13 | 18,720,000.0000 |
| 400 | 14 | 20,160,000.0000 |
| 400 | 15 | 21,600,000.0000 |
| 400 | 16 | 23,040,000.0000 |
| 400 | 17 | 24,480,000.0000 |
| 400 | 18 | 25,920,000.0000 |
| 400 | 19 | 27,360,000.0000 |
| 400 | 20 | 28,800,000.0000 |
| 400 | 21 | 30,240,000.0000 |
| 400 | 22 | 31,680,000.0000 |
| 400 | 23 | 33,120,000.0000 |
| 400 | 24 | 34,560,000.0000 |
| 500 | 1 | 1,800,000.0000 |
| 500 | 2 | 3,600,000.0000 |
| 500 | 3 | 5,400,000.0000 |
| 500 | 4 | 7,200,000.0000 |
| 500 | 5 | 9,000,000.0000 |
| 500 | 6 | 10,800,000.0000 |
| 500 | 7 | 12,600,000.0000 |
| 500 | 8 | 14,400,000.0000 |
| 500 | 9 | 16,200,000.0000 |
| 500 | 10 | 18,000,000.0000 |
| 500 | 11 | 19,800,000.0000 |
| 500 | 12 | 21,600,000.0000 |
| 500 | 13 | 23,400,000.0000 |
| 500 | 14 | 25,200,000.0000 |
| 500 | 15 | 27,000,000.0000 |
| 500 | 16 | 28,800,000.0000 |
| 500 | 17 | 30,600,000.0000 |
| 500 | 18 | 32,400,000.0000 |
| 500 | 19 | 34,200,000.0000 |
| 500 | 20 | 36,000,000.0000 |
| 500 | 21 | 37,800,000.0000 |
| 500 | 22 | 39,600,000.0000 |
| 500 | 23 | 41,400,000.0000 |
| 500 | 24 | 43,200,000.0000 |
| 600 | 1 | 2,160,000.0000 |
| 600 | 2 | 4,320,000.0000 |
| 600 | 3 | 6,480,000.0000 |
| 600 | 4 | 8,640,000.0000 |
| 600 | 5 | 10,800,000.0000 |
| 600 | 6 | 12,960,000.0000 |
| 600 | 7 | 15,120,000.0000 |
| 600 | 8 | 17,280,000.0000 |
| 600 | 9 | 19,440,000.0000 |
| 600 | 10 | 21,600,000.0000 |
| 600 | 11 | 23,760,000.0000 |
| 600 | 12 | 25,920,000.0000 |
| 600 | 13 | 28,080,000.0000 |
| 600 | 14 | 30,240,000.0000 |
| 600 | 15 | 32,400,000.0000 |
| 600 | 16 | 34,560,000.0000 |
| 600 | 17 | 36,720,000.0000 |
| 600 | 18 | 38,880,000.0000 |
| 600 | 19 | 41,040,000.0000 |
| 600 | 20 | 43,200,000.0000 |
| 600 | 21 | 45,360,000.0000 |
| 600 | 22 | 47,520,000.0000 |
| 600 | 23 | 49,680,000.0000 |
| 600 | 24 | 51,840,000.0000 |
| 700 | 1 | 2,520,000.0000 |
| 700 | 2 | 5,040,000.0000 |
| 700 | 3 | 7,560,000.0000 |
| 700 | 4 | 10,080,000.0000 |
| 700 | 5 | 12,600,000.0000 |
| 700 | 6 | 15,120,000.0000 |
| 700 | 7 | 17,640,000.0000 |
| 700 | 8 | 20,160,000.0000 |
| 700 | 9 | 22,680,000.0000 |
| 700 | 10 | 25,200,000.0000 |
| 700 | 11 | 27,720,000.0000 |
| 700 | 12 | 30,240,000.0000 |
| 700 | 13 | 32,760,000.0000 |
| 700 | 14 | 35,280,000.0000 |
| 700 | 15 | 37,800,000.0000 |
| 700 | 16 | 40,320,000.0000 |
| 700 | 17 | 42,840,000.0000 |
| 700 | 18 | 45,360,000.0000 |
| 700 | 19 | 47,880,000.0000 |
| 700 | 20 | 50,400,000.0000 |
| 700 | 21 | 52,920,000.0000 |
| 700 | 22 | 55,440,000.0000 |
| 700 | 23 | 57,960,000.0000 |
| 700 | 24 | 60,480,000.0000 |
| 800 | 1 | 2,880,000.0000 |
| 800 | 2 | 5,760,000.0000 |
| 800 | 3 | 8,640,000.0000 |
| 800 | 4 | 11,520,000.0000 |
| 800 | 5 | 14,400,000.0000 |
| 800 | 6 | 17,280,000.0000 |
| 800 | 7 | 20,160,000.0000 |
| 800 | 8 | 23,040,000.0000 |
| 800 | 9 | 25,920,000.0000 |
| 800 | 10 | 28,800,000.0000 |
| 800 | 11 | 31,680,000.0000 |
| 800 | 12 | 34,560,000.0000 |
| 800 | 13 | 37,440,000.0000 |
| 800 | 14 | 40,320,000.0000 |
| 800 | 15 | 43,200,000.0000 |
| 800 | 16 | 46,080,000.0000 |
| 800 | 17 | 48,960,000.0000 |
| 800 | 18 | 51,840,000.0000 |
| 800 | 19 | 54,720,000.0000 |
| 800 | 20 | 57,600,000.0000 |
| 800 | 21 | 60,480,000.0000 |
| 800 | 22 | 63,360,000.0000 |
| 800 | 23 | 66,240,000.0000 |
| 800 | 24 | 69,120,000.0000 |
| 900 | 1 | 3,240,000.0000 |
| 900 | 2 | 6,480,000.0000 |
| 900 | 3 | 9,720,000.0000 |
| 900 | 4 | 12,960,000.0000 |
| 900 | 5 | 16,200,000.0000 |
| 900 | 6 | 19,440,000.0000 |
| 900 | 7 | 22,680,000.0000 |
| 900 | 8 | 25,920,000.0000 |
| 900 | 9 | 29,160,000.0000 |
| 900 | 10 | 32,400,000.0000 |
| 900 | 11 | 35,640,000.0000 |
| 900 | 12 | 38,880,000.0000 |
| 900 | 13 | 42,120,000.0000 |
| 900 | 14 | 45,360,000.0000 |
| 900 | 15 | 48,600,000.0000 |
| 900 | 16 | 51,840,000.0000 |
| 900 | 17 | 55,080,000.0000 |
| 900 | 18 | 58,320,000.0000 |
| 900 | 19 | 61,560,000.0000 |
| 900 | 20 | 64,800,000.0000 |
| 900 | 21 | 68,040,000.0000 |
| 900 | 22 | 71,280,000.0000 |
| 900 | 23 | 74,520,000.0000 |
| 900 | 24 | 77,760,000.0000 |
| 1000 | 1 | 3,600,000.0000 |
| 1000 | 2 | 7,200,000.0000 |
| 1000 | 3 | 10,800,000.0000 |
| 1000 | 4 | 14,400,000.0000 |
| 1000 | 5 | 18,000,000.0000 |
| 1000 | 6 | 21,600,000.0000 |
| 1000 | 7 | 25,200,000.0000 |
| 1000 | 8 | 28,800,000.0000 |
| 1000 | 9 | 32,400,000.0000 |
| 1000 | 10 | 36,000,000.0000 |
| 1000 | 11 | 39,600,000.0000 |
| 1000 | 12 | 43,200,000.0000 |
| 1000 | 13 | 46,800,000.0000 |
| 1000 | 14 | 50,400,000.0000 |
| 1000 | 15 | 54,000,000.0000 |
| 1000 | 16 | 57,600,000.0000 |
| 1000 | 17 | 61,200,000.0000 |
| 1000 | 18 | 64,800,000.0000 |
| 1000 | 19 | 68,400,000.0000 |
| 1000 | 20 | 72,000,000.0000 |
| 1000 | 21 | 75,600,000.0000 |
| 1000 | 22 | 79,200,000.0000 |
| 1000 | 23 | 82,800,000.0000 |
| 1000 | 24 | 86,400,000.0000 |