Find the available lumens per sq ft you want to use then read across to the type of bulb you have. The shaded area of the table marks the 5000-10000 lumen per square foot range, this is the range most growers use.
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(figures 3 sq ft and greater have been rounded to the nearest integer, figures less than 1 sq ft not shown) |
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| Available Lumens per Sq Ft |
Bulb Wattage | Available Lumens per Sq Ft |
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| 1500 | 1000 | 600 | 430 | 400 | 250 | 175 | 100 | 70 | 40 | ||||||||
| MH | M H |
H P S |
HPS | HPS | M H |
H P S |
M H |
H P S |
MH | M H |
H P S |
M H |
H P S |
4 foot Fluoro Gro |
4 foot Fluoro cw/ww |
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| 33000 | 5 | 4 | 4 | 3 | 1.6 | 1.2 | 1.5 | 33000 | |||||||||
| 32000 | 5 | 4 | 4 | 3 | 1.6 | 1.2 | 1.5 | 32000 | |||||||||
| 31000 | 5 | 4 | 4 | 3 | 1.7 | 1.2 | 1.6 | 31000 | |||||||||
| 30000 | 5 | 4 | 5 | 3 | 1.7 | 1.3 | 1.6 | 30000 | |||||||||
| 29000 | 5 | 4 | 5 | 3 | 1.8 | 1.3 | 1.7 | 1 | 29000 | ||||||||
| 28000 | 6 | 4 | 5 | 3 | 1.9 | 1.4 | 1.8 | 1 | 28000 | ||||||||
| 27000 | 6 | 4 | 5 | 3 | 1.9 | 1.4 | 1.8 | 1 | 27000 | ||||||||
| 26000 | 6 | 5 | 5 | 3 | 2 | 1.5 | 1.9 | 1.1 | 26000 | ||||||||
| 25000 | 6 | 5 | 5 | 3 | 2.1 | 1.5 | 2 | 1.1 | 25000 | ||||||||
| 24000 | 6 | 5 | 6 | 4 | 2.2 | 1.6 | 2.1 | 1.2 | 24000 | ||||||||
| 23000 | 7 | 5 | 6 | 4 | 2.3 | 1.7 | 2.1 | 1.2 | 23000 | ||||||||
| 22000 | 7 | 5 | 6 | 4 | 2.4 | 1.7 | 2.2 | 1 | 1.3 | 22000 | |||||||
| 21000 | 7 | 6 | 6 | 4 | 2.5 | 1.8 | 2.3 | 1 | 1.3 | 21000 | |||||||
| 20000 | 8 | 6 | 7 | 4 | 3 | 1.9 | 2.5 | 1.1 | 1.4 | 20000 | |||||||
| 19000 | 8 | 6 | 7 | 5 | 3 | 2 | 3 | 1.1 | 1.5 | 19000 | |||||||
| 18000 | 9 | 7 | 8 | 5 | 3 | 2.1 | 3 | 1.2 | 1.6 | 18000 | |||||||
| 17000 | 9 | 7 | 8 | 5 | 3 | 2.3 | 3 | 1.2 | 1.6 | 17000 | |||||||
| 16000 | 10 | 8 | 8 | 5 | 3 | 2.4 | 3 | 1.3 | 1.8 | 16000 | |||||||
| 15000 | 10 | 8 | 9 | 6 | 3 | 3 | 3 | 1.4 | 1.9 | 1 | 15000 | ||||||
| 14000 | 11 | 9 | 10 | 6 | 4 | 3 | 4 | 1.5 | 2 | 1 | 14000 | ||||||
| 13000 | 12 | 9 | 10 | 7 | 4 | 3 | 4 | 1.6 | 2.2 | 1.1 | 13000 | ||||||
| 12000 | 13 | 10 | 11 | 7 | 4 | 3 | 4 | 1.8 | 2.3 | 1.2 | 12000 | ||||||
| 11000 | 14 | 11 | 12 | 8 | 5 | 3 | 4 | 1.9 | 3 | 1.3 | 11000 | ||||||
| 10000 | 15 | 12 | 14 | 9 | 5 | 4 | 5 | 2.1 | 3 | 1.5 | 10000 | ||||||
| 9000 | 17 | 13 | 15 | 10 | 6 | 4 | 5 | 2.3 | 3 | 1.6 | 1 | 9000 | |||||
| 8000 | 19 | 15 | 17 | 11 | 7 | 5 | 6 | 3 | 4 | 1.8 | 1 | 1.2 | 8000 | ||||
| 7000 | 22 | 17 | 19 | 12 | 7 | 5 | 7 | 3 | 4 | 2.1 | 1.2 | 1.3 | 7000 | ||||
| 6000 | 26 | 20 | 23 | 15 | 9 | 6 | 8 | 4 | 5 | 2.4 | 1.4 | 1.5 | 1 | 6000 | |||
| 5000 | 31 | 24 | 27 | 17 | 10 | 8 | 10 | 4 | 6 | 3 | 1.6 | 1.8 | 1 | 1.2 | 5000 | ||
| 4000 | 39 | 30 | 34 | 22 | 13 | 10 | 12 | 5 | 7 | 4 | 2 | 2.3 | 1.2 | 1.5 | 4000 | ||
| 3000 | 52 | 40 | 45 | 29 | 17 | 13 | 16 | 7 | 9 | 5 | 3 | 3 | 1.7 | 2 | 1 | 3000 | |
| 2000 | 77 | 60 | 68 | 44 | 26 | 19 | 25 | 11 | 14 | 7 | 4 | 5 | 2.5 | 3 | 1 | 1.6 | 2000 |
| 1000 | 155 | 120 | 135 | 87 | 52 | 38 | 49 | 21 | 28 | 15 | 8 | 9 | 5 | 6 | 2 | 3 | 1000 |
| 1500 | 1000 | 600 | 430 | 400 | 250 | 175 | 100 | 70 | 40 Fluorescent |
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