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Old 02-25-2005, 06:20 PM   #1
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Metal Halide and HQI

What is the difference btwn the screw on MH bulbs and an HQI bulb? The HQI systems seem more expensive? Any difference in light spectrum or quality?

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Old 02-25-2005, 07:51 PM   #2
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The hqi are a much better setup. The light is more intense than a standard mogul bulb. I have read that they are supposed to put out close to double the intensity.
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Old 02-25-2005, 10:46 PM   #3
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and smaller
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Old 02-26-2005, 12:40 AM   #4
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Ive been told the HQI are alot hotter and they burn out quicker.. is this true?
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Old 02-26-2005, 12:54 AM   #5
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well they should never be ran till they burn out ! should be changed out yearly imo
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Old 02-26-2005, 01:05 AM   #6
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HQI also requires a glass shield between the bulb and the tank due to the high levels of UV that they put out. Regular MH bulbs put out UV as well, but the glass that the bulb is made of shields most of it.
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