When did T8 tubes come out? « on: November 02, 2018, 05:38:20 AM » Author: halofosfaatti
I have wondered when they come out.
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	Re: When did T8 tubes come out? « Reply #1 on: November 02, 2018, 06:08:00 AM » Author: dor123
I think during the 80's: http://www.lamptech.co.uk/Documents/FL%20Gases.htm The Americans also have T8 tubes, but they are completely different lamps than ours.
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	Re: When did T8 tubes come out? « Reply #2 on: November 02, 2018, 06:52:30 AM » Author: halofosfaatti
Ok. What is the differences beetween European and American tubes?
« Last Edit: November 02, 2018, 07:52:45 AM by halofosfaatti »		Logged

Too many things are secret. Only open information can really preserve old technology.

I like fluorescent and other conventional lighting and old electronic equipment. Today's things are not made to last.

	Re: When did T8 tubes come out? « Reply #3 on: November 02, 2018, 09:56:14 AM » Author: dor123
European T8 have krypton buffer gas, and intended to replace T12 on their series chokes. They are available at 18W (For 20W T12), 36W (For 40W T12) and 58W (For 65W T12). American T8 have argon gas, and requires a dedicated ballast for them, and aren't intended to retrofit for T12 lamps on their ballast (Otherwise they would be overdriven). Available in various wattage ratings, most commonly 32W, which have the same length as 40W T12.
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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: When did T8 tubes come out? « Reply #4 on: November 02, 2018, 10:28:04 AM » Author: funkybulb
GE started making T8 even back in it Heyday anyway the 32 watt and 17 watts lamps  came out in early 1980s.  but preheat T8 been around. for a good while.
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	Re: When did T8 tubes come out? « Reply #5 on: November 02, 2018, 01:06:29 PM » Author: halofosfaatti
Ok.
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Too many things are secret. Only open information can really preserve old technology.

I like fluorescent and other conventional lighting and old electronic equipment. Today's things are not made to last.

	Re: When did T8 tubes come out? « Reply #7 on: November 02, 2018, 04:51:36 PM » Author: Roi_hartmann
If 15w t8 was there right from the beginning what was the point of 15w t12 lamps?
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	Re: When did T8 tubes come out? « Reply #9 on: November 03, 2018, 04:06:32 AM » Author: dor123
I don't know about the 14W, 23W, 36W-1m and 38W T8s and the 14W, 25W, 40W-1m and 42W T12. I know that the British only have the 70W T8 that retrofits 75-85W T12 and the 100W T12 which retrofits the 125W T5.
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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: When did T8 tubes come out? « Reply #10 on: November 03, 2018, 06:16:55 AM » Author: halofosfaatti
Some sources say that T12 tubes do not need very pure and expensive phosphors that T8 tubes need (due to proximity of arc?). Newer triphosphor mixtures are not very sensitive to the arc, but they are more expensive and using T8 helps to reduce costs and achieving needed electrical characteristics.
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Too many things are secret. Only open information can really preserve old technology.

I like fluorescent and other conventional lighting and old electronic equipment. Today's things are not made to last.

	Re: When did T8 tubes come out? « Reply #11 on: November 03, 2018, 06:20:17 AM » Author: dor123
T8 uses the same phosphors as the T12. These are the long T5 and the CFLs which requires the triphosphors, since they operates at much higher loading than T8 and T12, so the halophosphors would fade much faster on them.
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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: When did T8 tubes come out? « Reply #12 on: November 03, 2018, 01:48:17 PM » Author: dor123
Oops. I meant 125W T12, not T5.
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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: When did T8 tubes come out? « Reply #13 on: November 08, 2018, 09:40:25 AM » Author: Rommie
I first remember seeing T8 tubes here in the late 60's/early 70's, my next door neighbour who was an electrician had one in his living room. I thought then that they looked weird compared to T12's, which I still think are the best tubes ever, especially the BC capped ones
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