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Old 07-23-2005, 04:35 PM   #1
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Mh ? 250 watt

Is there a top or bottom to a single ended MH bulb?

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Old 07-23-2005, 05:07 PM   #2
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Not that I am aware of. Just screw them in.
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*180 gal Display, 100 gal basement sump, 33 gal refugium, 3x250 MH, 2x160 VHO actinics, zoos, some softies, LPS & lots of acros and other SPS.
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Old 07-23-2005, 05:58 PM   #3
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is this a trick question?
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Old 07-23-2005, 06:45 PM   #4
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No trick ? I was thinking that someone said there was.
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Old 07-26-2005, 05:06 PM   #5
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I've read it' is best to position them w/ the nipple facing up. I can't remember exactly why, but one of the reasons is it could negatively affect the k of the bulb if it is not. HTH
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Old 07-26-2005, 05:09 PM   #6
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All mine are horizontal. What kind application would you need it straight up and down? The majority of the light comes from the sides.
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Old 07-26-2005, 05:13 PM   #7
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Quote:
What kind application would you need it straight up and down?
I'm referring to the nipple on the inner part of the bulb- the fixture is still mounted horizontally over the tank(..if I'm understanding you right).
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Old 07-26-2005, 05:16 PM   #8
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got ya
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Old 07-26-2005, 05:27 PM   #9
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Looks like there is more to it than just nipple orientation. Here is an informative read "Nipple Nonsense"
http://www.advancedaquarist.com/issu...ductreview.htm
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Old 07-26-2005, 05:44 PM   #10
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Nice article. Thanks In short...just screw it in.
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