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01/06/2009, 01:46 PM
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#1 |
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Registered Member
Join Date: Feb 2007
Location: The Island
Posts: 1,173
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Difference between MH and HQI???
Ok, IS there a difference? some lighting, i see "Metal Halides!" and some are "HQI"...is there a difference?
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the low cost of 3 Ramen meals a day is feeding my zoa addiction Current Tank Info: had a few small reefs in the past, researching for my future 125 :) |
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01/06/2009, 02:04 PM
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#2 |
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Marquis de Carabas
Join Date: Aug 2008
Location: Evansville, IN
Posts: 2,523
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Halogen Quartz Iodide... basically the main difference that I know of is HQI is typically (maybe always) double ended and MH tend(again, i believe always) to be screw in single ended.
Thats how I understand it but I'm a T5HO man myself so my knowledge is limited
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Jeremy Brown liquor never hurt anybody “Je n'ai pas besoin de cette hypothèse" Pierre-Simon Laplace I should want to cook him a simple meal, but I shouldn't want to cut into him, to tear the flesh, to wear the flesh, to be born unto new worlds where his flesh becomes my key. Current Tank Info: broken and dry |
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01/06/2009, 02:13 PM
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#3 |
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Registered Member
Join Date: Feb 2007
Location: The Island
Posts: 1,173
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oh, well mines HQI then...i think. its a sunpod and its double ended, i'm pretty sure
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the low cost of 3 Ramen meals a day is feeding my zoa addiction Current Tank Info: had a few small reefs in the past, researching for my future 125 :) |
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01/06/2009, 03:01 PM
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#4 | |
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Registered Member
Join Date: Jan 2009
Location: Florida
Posts: 208
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Quote:
http://en.wikipedia.org/wiki/Hydrargyrum_quartz_iodide Halogens (Quartz Halogen) are actually a variety of incandescent lamp. http://en.wikipedia.org/wiki/Incande...e_halogen_lamp HQI lamps can come in both single-ended (SE) screw-in type (medium, mogul) lamps and double-ended (DE) push-in lamps. HQI lamps require a ballast made to run them. Not all Metal Halide ballasts will run an HQI lamp. One of the main differences between the SE and DE lamps is the DE lamps have no UV protection and require a UV glass shield while the SE lamps have a UV coating and can be used without a shield. Of course if you run any metal halide lamp without a shield it can crack or explode if it gets splashed. Like jenglish said, for the most part, if your lamp is double-ended it's HQI. Last edited by MotherFish; 01/06/2009 at 03:07 PM. |
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01/06/2009, 03:10 PM
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#5 |
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Registered Member
Join Date: Feb 2007
Location: The Island
Posts: 1,173
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is HQI better at all than MH?
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the low cost of 3 Ramen meals a day is feeding my zoa addiction Current Tank Info: had a few small reefs in the past, researching for my future 125 :) |
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01/06/2009, 03:38 PM
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#6 |
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Registered Member
Join Date: Jan 2009
Location: Florida
Posts: 208
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To the best of my knowledge one isn't really "better" than the other.
There may be a little price difference when buying all the components for the first time, I believe the DE HQI setup runs a little more, but if you really want to do some reading on MH lamps then you should check out Sanjay's site: http://www.reeflightinginfo.com/ That guy has probably forgotten more about lighting than I'll ever know. 
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01/06/2009, 03:44 PM
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#7 |
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Registered Member
Join Date: Jun 2002
Location: OC, CA, US
Posts: 2,135
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HQI light runs brighter and hotter then normal MH. Eballast is most effcient but if you need more light then 250W eballast or a 400W eballast can produce then use HQI. I have 250W HQI b/c I wanted less watts then eballast 400W but brighter then 250Watts.
Simon |
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