What are the
advantages of LEDGrowLightsTM?
How many LEDGrowLights do I need to replace metal halide lights?
LEDGrowlights vs. HID: Vegetative Growth Comparison
Using LEDGrowLights with HID
lighting
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What are the advantages of LEDGrowLights?
LEDGrowLights will:
- Deliver high intensity light in a confined space
- Be safe for plants that are sensitive to heat or UV radiation
- Reduce heat output
- Allow multi-tier gardening
- Use areas where space or ventilation restricts the use of HID lights
- Reduce of power consumption
- Eliminate noise and high voltage generated by HID ballasts
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How many LEDGrowLights do I need to
replace my metal halide lights?
Why do HID lights look so bright?
LEDGrowLights provide a higher
fraction of light in the peak areas of the spectrum of chlorophyll absorption.
You should use enough LED lighting to produce 30% of the lux or ft-cd levels
produced by metal halide lights, or 25-35% of the wattage per square foot you are using
for MH lighting. A general guideline is one R180XB red light per
square foot, plus blue lights as required. See the growth comparison.
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LED v. HID: Vegetative Growth
Comparison
The following test results illustrate the type of growth rates
obtained with LEDGrowLights. Results are 23 days after germination. Test plant is
Argentine bahiagrass (Paspalum Notatum).
Click here for
complete test results |
LEDGrowLightsTM |
Metal halide |
 |
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Equivalent to 7
watts/s.f.
of our current lights
5,300 lux |
44 watts/s.f. of MH lighting
7,400 lux |
|
Using LEDGrowLights with HID
lighting
If you are currently using HIDs for high-light, yield intensive applications,
supplemental lighting with LEDGrowLights can give you an extra boost of growing power
with a very small increase in wattage and negligible increase in heat. Start
by adding 10-20 watts of LEDs for each 100 watts of HID lighting.
Alternatively, reduce your HID wattage by 100 watts and replace with 25 watts of LEDGrowLights. This will reduce both your power consumption and heat output. |
Why do HID lights look so
bright?
The human eye is very sensitive to light in the yellow and
green regions (500-600 nm). HID lights produce a large amount of yellow and
green light, so they look very bright indeed to the human eye. The following chart
shows the relative spectral intensity of LEDGrowLights and a typical HID-MH grow light,
together with the human eye response curve. LEDGrowLights have much less
energy in the yellow-green area, so they do not look nearly as bright to your eyes as HID
lights.
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