Found definitively which gas filling the american F32T8 and the F34T12 have « on: May 04, 2012, 09:15:05 AM » Author: dor123
James Hooker already said me that the F32T8 contains pure argon and not krypton-argon like the european energy saver T8s. Also I have already knew that the F34T12 have an electrically conductive coating inside the tube. But i wanted to ask more professional factor. So i joined to Philips LightCommunity , and open a thread about what are the buffer gases of these two american energy saver lamps. The results: F32T8: Argon F34T12: Krypton + argon (Plus the conductive coating) Here is the thread: http://community.lighting.philips.com/thread/2631 . Now, the F34T12 turned out to be a pre T8 krypton energy saver fluorescent lamp, which retained in a T12 format (Similar to the british krypton 8ft 100W T12 lamp that operates on the preheat/switchstart ballast of the argon 8ft 125W T12), and not reduced to a T8 format. So I don't know actually why the F34T12s damages and overheats the american F40T12 rapidstarts if the 100W T12 don't damages the 125W T12 preheat/switchstart ballasts at all. Is this related to the differencies in the types of ballasts that these lamps operates? (The american F34T12 operates on a HPF rapidstart ballast for a F40T12. The british 100W T12 operates on a simple preheat/switchstart choke for a 125W T12)
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	Re: Found definitively which gas filling the american F32T8 and the F34T12 have « Reply #1 on: May 04, 2012, 11:48:59 AM » Author: funkybulb
dor it the older Full current HPF rapid start and older Preheat Tulamp ballast tend to have problems with F34T12  lamps, this becase the lower operating voltage lamp and increase current on the ballast. the normal F40 lamp is 430 MA wile these F34 put 460 MA on the ballast. they have no problem on moderen reduce wattage ballast rapid start ballast, and tulamp ballast at the time was phaseing out the market because consumer choice of rapid start. as the F32 it a differnt ballast gear with higher OCV. the early days of F32 lamp gear was rapid start, then when HF was interduce it became standard to run lamp on instant start. so this F32 still made to run on both type of ballast how ever they made F25 and F28 4 footer energy saving like the F34. wich is hard on old F32 gear as well. but they have no problem on electronic ballast wich is design for to use on.
« Last Edit: May 04, 2012, 11:57:09 AM by funkybulb »		Logged

No LED gadgets, spins too slowly.  Gotta  love preheat and MV. let the lights keep my meter spinning.

	Re: Found definitively which gas filling the american F32T8 and the F34T12 have « Reply #2 on: May 04, 2012, 01:41:03 PM » Author: dor123
So how the british energy saving 8ft 100W T12 lamp that retrofits the 8ft 125W T12, don't ruins its preheat ballast (Which is a simple choke)? The 100W T12 have also lower voltage than the 125W T12. Yet it don't ruins the 125W T12 ballast.
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: Found definitively which gas filling the american F32T8 and the F34T12 have « Reply #4 on: May 04, 2012, 04:06:44 PM » Author: dor123
I means that both the british 8ft 100W T12 and the american F34T12, are the same form of energy saving T12 lamps (Krypton-argon buffering, lower operating voltage than the full wattage lamps, and the ability to retrofit existing ballasts), except that the F34T12 have a conductive coating because it designed to retrofit a rapidstart ballast instead of preheat. Yet, while the 125W T12 chokes can survive for tens of years with 100W T12s, the american F40T12 HPF rapidstarts, even the very old and reliable ones, distroyed rapidly from the F34T12s. Why this is happening? Is this related to the differencies between ballast types (Preheat/switchstart chokes vs HPF rapidstart HX [Autotransformer] tulamp [usually] ballasts)?
« Last Edit: May 04, 2012, 04:08:55 PM by dor123 »		Logged

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: Found definitively which gas filling the american F32T8 and the F34T12 have « Reply #6 on: May 05, 2012, 02:55:52 AM » Author: dor123
Ash: But the british 125W T12 chokes can operate for tens of years with the british 100W T12s retrofit lamps, despite the lamps lower operating voltage. So why the 100W T12s don't ruins the 125W T12 ballasts and the F34T12s do ruins their F40T12 ballasts???
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I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.

	Re: Found definitively which gas filling the american F32T8 and the F34T12 have « Reply #9 on: May 06, 2012, 06:48:34 AM » Author: dor123
Luminaire: I totally forgot from the picture you mentioned. Don't know why i didn't got the information of the gasfilling of the american T8 from it. There are actually five american T8 tubes of the same length of the F40T12: From them, two of them (F32T8 SPX and F32T8/HL) are 32W T8 and indeed have argon only. The third (F30T8) isn't the known classic 30W T8, because it have the same length of the F40T12, and have an addition of 10% krypton (The original 30W T8 36", have pure argon). The fourth (F28T8) is an 28W T8 with a 30% krypton in argon, and the last (F32T8/25W) have 90% krypton in argon, and because of this, it can't be retrofitted with the F32T8 rapidstart ballasts, but needs a dedicated electronic ballast which can produces a HV pulse sufficiently high to strike the lamp. The european energy saving T8, have 75% krypton in argon. The higher the krypton content in argon, the higher the starting voltage and the lower lamp operating voltage will be. Thanks Luminaire for this information.
« Last Edit: May 06, 2012, 06:53:18 AM by dor123 »		Logged

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.