HPI lights are a type of metal halide lamps that are very suitable for growing. HPI lights are especially useful during the vegetative stage due to their white light and high intensity.

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Lighting | Light cycle | Dark cycle | Light shortage | Light distribution | Light spectrum | Blue light | Red light | Nanometer | Light tight | Lumen | Lux | Reflecting light | Lamp height

HPS lights |LED lights | Compact fluorescent lights

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