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Old 11-06-2009, 08:33 AM   #1
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H.O. Lighting


Is it true that HO lights will come on bright even in cold conditions?
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Old 11-06-2009, 09:41 AM   #2
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HO like in High output and if so, I am presuming you are speaking of fluorescent lamps?


HO lamps will start in colder weather than non-HO lamps. There are also VHO as well that will start in even colder weather.

using electronic ballasts also helps lamps to operate in colder weather. A normal lamp using an electronic ballast will often start in weather nearly as cold as an HO magnetic ballast.


just be aware; you need to use HO ballasts with HO lamps, regular ballasts with regular lamps and VHO ballasts with VHO lamps. The wattages are different for each type so the ballasts must match the lamps.

so, I guess the answer you seek would depend on what you mean by:

"cold conditions"
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Old 11-06-2009, 11:52 AM   #3
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I live in nw ohio so temps would be as low as 0 F,and I am talking about Florescent lamps, will they come on bright when it is cold unlike slimline lamps
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Old 11-07-2009, 12:38 AM   #4
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The true " cold tempture " or " low tempture " bulbs are rated low as -20F so you can able lit them up that cold the slimline can barely start that cold espcally if hit zero F

For cold weather useage or unheated area do not use the reduced wattage flourscent bulbs they are not worth a crap in the cold they will go dim very fast when it get colder than 40 or so degress F

The 8 foot HO bulbs is 110 watt that is correct bulb for unheated / cold weather useage.

With electronic ballast it may be little more lower starting tempture however if you use standard HO ballast make sure you keep a little spaceing between the luminaire and ceiling to prevent ballast get overheat plus they will make a buzzing noise unless you get electronic ballast verison then it will be quiet.

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Old 11-07-2009, 01:34 PM   #5
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In cold ambient temps, it will take a few minutes for the HO bulbs to obtain full brightness. Be sure that you use the HO-0 bulbs in any case.
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Old 11-07-2009, 04:02 PM   #6
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Quote:
Originally Posted by kbsparky View Post
In cold ambient temps, it will take a few minutes for the HO bulbs to obtain full brightness. Be sure that you use the HO-0 bulbs in any case.
HO-0 bulbs?
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Old 11-08-2009, 12:35 AM   #7
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Quote:
Originally Posted by nap View Post
HO-0 bulbs?

High Output - Outdoor verison

that one way they make that verison and it will come in either jacketed or nonjacketed verison.

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Old 11-08-2009, 06:26 AM   #8
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Yes, Outdoor rated. Full 110 watt output as well.
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Old 11-08-2009, 01:11 PM   #9
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are you sure you guys don't mean CW rated?

I have never seen one rated as "outdoor".
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Old 11-08-2009, 02:53 PM   #10
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I just googled it & there are HO-O bulbs listed as outdoor
They were some also listed as HO-O & CW
So it may mean the same thing ?



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Old 11-08-2009, 06:18 PM   #11
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Yes Dave it the same thing it all depending on the manufacter give the deststion of lettering or number but function wise both are complety interchangeable.
As long you have 800 MA { HO } ballast if you have 1500 MA ballast then it called VHO { very high output } that is diffrent beast the major gotcha between the two both bulbs have same socket so you really have to watch little closer when you replace it.

Merci,Marc
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Old 11-08-2009, 07:09 PM   #12
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I guess I could have googled it as well. I had never seen a lamp designated with an O. I guess I am going to have to research this a bit. I did google it and I came up with an CW/HO-O





Manufacturer: Philips
Manufacturer's Part #: 381764
F96T12/CW/HO-O/ALTO
Color Temperature: 4100K
Life Hours: 12,000
Initial Lumens: 8800
Color Rendering Index (CRI): 62
Base Type: Recessed Double Contact

Don't know why they would apply a redundant marking. I would think there is something about an O that is different than a non-O lamp.
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