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Old 01-08-2004, 05:52 AM
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beaker020 beaker020 is offline
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MH dont have a filament. If it does have a filament then its not a metal halide but it could be a halogen lamp. Halogens have too much heat and the wrong colour for aquarium use.

Ive heard of HID which stands for High Intensity Discharge. meaning its an arc lamp.
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