Many indoor gardeners start out their seedlings under standard fluorescent grow lights. This method works fine as long as the vegetative area you wish to cover does not exceed 3 fixtures and your plants stay under 24 inches tall. Even still, you will not be able to get the most out of your plants without introducing the appropriate amount of light in the blue and red part of the spectrum. Continued below.
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 Sunmaster 1000 watt MH Bulb Cool Dx Lamp Metal Halide  US $99.95
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 Eiko 400 watt MH Bulb 400w Lamp Hydroponics US $24.95
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 Sunmaster 400 watt MH Bulb 400w Lamp Metal Halide US $49.95
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 6pc MH 400 W WATT 400W M59 HYDROPONICS GROW LIGHTS BULB US $59.90
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 6pc MH 1000W 1000 W HYDROPONIC HALIDE GROW LIGHT BULB US $179.90
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 6pc MH 1000 W WATT HYDROPONIC GROW LIGHT BULB ED37 M47 US $149.90
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 360 watt SUB for 400w MH METAL HALIDE light BULB MP360 US $39.99
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 175w MH LAMP any position hydroponics US $19.00
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 400 WATT MH DIGITAL GROW LIGHT XL HOOD 400w SUN SYSTEM US $136.95
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If you wish to allow your plants to experience the best vegetative growth they can, light in the blue spectrum is what is needed. Thick and stocky plants capable of bearing more fruit and flowers can be achieved by using metal halide grow lights. The blue light emitted by MH grow lights allows for vigorous growth in the vegetative stage - just be sure to provide adequate airflow and strict temperature control to compensate for the heat output by this high intensity bulb.
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