What Is Hydroponics?
Hydroponics is a way of growing plants without soil. Hydroponics, translates from hydro=water and ponos=works. Hydroponics literally means water works. Hydroponic equipment is best suited for indoor gardening or greenhouses. Soilless gardening lets plant take up nutrient faster which means a quicker growing, more compact and more nutritious plant in a smaller space.
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What size light(s) do you need?
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Light Size
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Light Only covers sq. ft. |
Plus Sunlight covers sq. ft.
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Cost for a 16 hour day @$0.08/KWH
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100w -150w
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4 ft.
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9 ft.
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$ .13
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175w
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4 ft.
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9 ft.
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$ .14
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250w
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9 ft.
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16 ft.
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$ .24
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400w
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16 ft.
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25 ft.
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$ .38
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600w
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36 ft.
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49 ft.
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$ .57
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1000w
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64 ft.
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144 ft.
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$ .96
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Here are calculations so you may properly size your light for your circuit breaker. No one needs a fire!
The formula for converting Watts to Amps is : Watts = Amps * Volts
The formula for converting Amps to Watts is : Amps = Watts / Volts
SAFTEY WARNING : Only use 80% of the circuit breaker capacity!
Common Conversions North American and other 110 volt countries
Lights :
1000W / 110V = 9.1A
600W / 110V = 5.4A
400W / 110V = 3.6A
250W / 110V = 2.3A
Circuits :
10A * 110V = 1100W and 80% safe usage is 880W
15A * 110V = 1650W and 80% safe usage is 1320W
25A * 110V = 2750W and 80% safe usage is 2200W
30A * 110V = 3300W and 80% safe usage is 2640W
Common Conversions British Commonwealth and other 240 volt countries
Lights :
1000W / 240V = 4.1A
600W / 240V = 2.5A
400W / 240V = 1.7A
250W / 240V = 1.1A
Circuits :
10A * 240V = 2400W and 80% safe usage is 1920W
15A * 240V = 3600W and 80% safe usage is 2880W
25A * 240V = 6000W and 80% safe usage is 4800W
30A * 240V = 7200W and 80% safe usage is 5760W
Remember that a circuit services more than one power outlet.
A two outlet wall plug will use only one circuit.
There will be more outlets on 240V systems per circuit than there will be in 110V systems.
Check out more information on Phillips bulbs.
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The black area shows the primary area
and the white area represents the supplementary area.
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Here are charts for measuring footcandles
based on bulb wattage and distance:
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| Plant: Recommended Footcandles: |
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| Azalea |
1000
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| Chrysanthemums |
2000
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| Coffee |
1000+
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| Cucumbers |
4000
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| Coleus |
1000
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| Cineraria |
1000
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| Gloxinia |
1000
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| Saintpaulia |
1000
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| Geranium |
1500
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| Pepper (Sweet) |
2000
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| Everbearing Strawberries |
1500-2000
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| Sweet Pea |
1500-2000
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| Tomatoes |
1500-2000
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1 lumens /sq. meter = 1 lux
1 lumens /sq. foot = 1 foot-candles
How can I convert between lux and Foot-candles?
To convert between lux and foot-candles the following factors can be used:
Lux =0.0929 * FC
Foot Candle= 10.76 * Lux
Conversion Factors
1 F.C. = 10.76 LUX
1 Micro Einstein (umol) = 7.62 F.C.
1 WATT / MTR2 = Output Bulb divided by Square meters
1 MTR2 = 10.76 FT2
1 WATT = 408 LUX
1 WATT = 37.9 F.C.
Need us to help you digest this info? Email us or call 866-791-1664
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