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Old 09-09-2009, 04:00 AM
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Default Dumb T5 question
A newbie question:

Are all T5's high output and if I have a T5 HO fixture can I run non HO T5's ?

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Old 09-09-2009, 04:58 AM
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Seems there are NO (normal output) T5 (seen a whole lot once dumpster diving at work), but are there NO T5 marine bulbs?
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Last edited by mark; 09-09-2009 at 05:01 AM.
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Old 09-09-2009, 05:12 AM
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Great Mark ...a question with a question. I am assuming any bulbs you buy from a LFS is going to be HO. I have a fixture from Current USA and they spec out HO for that fixture.
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Old 09-09-2009, 05:27 AM
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Probably find some nice 2700k or 4100K NO bulbs out there, just saying don't think I've ever come across non-HO marine bulbs. Not trying to be a smart as$.
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Old 09-09-2009, 05:40 AM
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So do you think that HO is more related to the temp of the bulb?
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Old 09-09-2009, 12:51 PM
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no, just for our application (marine) the manufacturers have focused more on HO rather than NO.
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Old 09-10-2009, 12:25 AM
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Coralife makes a bunch of NO T5 bulbs in 10K, Actinic spectrums. The boxes that the bulbs are in will specify if they are HO and will also give you the wattage which will tell you that they are HO or not. So yes, you need to read the package.
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Old 09-10-2009, 12:40 AM
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It's so confusing. I was told last month that ALL t5's are HO by the electrical parts store in town. How much wattage is it that makes it HO? Or are they right??
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Old 09-10-2009, 12:55 AM
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Personally, Ive never seen a T5 NO, or HO designation. Just T5. Also, never seen a T5 period outside of marine. All Home stuff is T8. Any fixtures I instal industry wise, are all T8 or T12. When your dealing with T12, theres NO, HO, and VHO. they alll are the same length bulbs, but the wattages are different. Only ever see one wattage rating for length of T5's
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Old 09-10-2009, 01:08 AM
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If you look at Big Al's web site under T5 bulbs you will find that NO is only 28 watts for 48" bulbs and HO is 54 watts for 48" bulbs. Just using Big Al's as a reference not recommending them! Coralife T5 fixtures are also NO not HO. Maybe it's just Coralife that has NO bulbs and fixtures? Home Depot also has a few fixtures on their web site. A 39" fixture (36" bulb) is only 21 watts compared to 39 watts for an HO fixture.
Last edited by intarsiabox; 09-10-2009 at 01:14 AM.
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