T5 Flourescent Lamps « on: January 31, 2009, 02:23:00 PM » Author: dor123
What is The Differences Between the vintage T5 Mini Fluorescent lamps <13W & the modern HO & HE Long T5 Flourescent lamp >14W
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	Re: T5 Flourescent Lamps « Reply #2 on: January 31, 2009, 07:25:48 PM » Author: dor123
The T5 HO is a T5 fluorescent lamps that are very long, with wattage higher then 24W, its brightness is the highest of all types of fluorescent lamps, almost as bright as compact fluorescent lamps, it can be run ONLY by electronic ballasts and if you run this lamp with Preheat Start ballast it will achieve an average life of 24,000 hours and a service life of 18,000 hours. also this avarage efficiency is as high as 100 Lm/W.
« Last Edit: January 31, 2009, 07:41:03 PM by dor123 »		Logged

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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: T5 Flourescent Lamps « Reply #4 on: January 31, 2009, 08:21:53 PM » Author: dor123
I talking about all brands. but I don't know why T5 HO & HE are Much more bright & efficient then the old short T5. perhaps because they contain another buffer gas then the short 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: T5 Flourescent Lamps « Reply #6 on: February 01, 2009, 11:20:13 AM » Author: dor123
which buffer gas there is in the T5 HO & HE fluorescent tubes?
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I only working with the international date format (dd.mm.yyyy).

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

	Re: T5 Flourescent Lamps « Reply #8 on: February 01, 2009, 01:01:20 PM » Author: dor123
This means that compact fluorescent lamps also contains argon only as a buffer gas and run at higher current because both CFL and T5 HO are very bright.
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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: T5 Flourescent Lamps « Reply #10 on: March 24, 2009, 04:24:48 PM » Author: Medved
Quote from: TiCoune66 on February 01, 2009, 01:20:12 PM Actually the T5s and CFLs are very small tubes, 5/8 inch for the T5s and as small as 2/8 inch for certain CFLs, so the phosphor is closer to the arc and brighter. Because of less volume, it takes shorter path for an UV photon from the excited mercury atom to the phosphor before it's absorbed back by some unexcited atom. This was known since the fluorescent lamp birth, as well was an associated  significant consequence: Higher operating wall temperature, while this was an two-fold obstacle: 1) Phosphors tend to loose their efficiency on high temperature. 2) Mercury vapor pressure too high, causing higher selfabsorbtion. So lamps were designed for most optimal current density (so diameter) and consequently dimension standard was set The first one was overcome by new chemistry used today, the second by the use of amalgams as mercury reservoirs, so the pressure is less dependent on temperature. Taking these adoptions into account, "old standard" sizes are not anymore lying on the optimum for given wattage rating, so adopted combinations, generally marked as "HO", were standardized, usually reducing tube diameter by one step, so e.g. ~4foot long 36W does not use T8, but T5 tube instead, becoming F36T5HO lamp.
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No more selfballasted c***