I was looking at Lamptech and some other resources at gas fill types for fluorescent tubes. All I can consistently find is that normal-output T12 tubes have approximately 3 torr of argon inside. Well that is all fine and dandy, but not all tubes are T12 NO. Are the gas fills for HO and VHO the same as NO? How about krypton tubes, are they pure krypton or a mix (and at what pressures)? I hear there is xenon and neon in some other tubes, what pressures are those at?

Does anybody have a chart or resource (or just know off the top of their head) what fills are in different diameter and different output level fluorescent tubes? I would like to add this to my public lamp spec sheet.

European T8 lamps have krypton. European "Eco T8" and "Eco T5" lamps have xenon. American VHO T12 have Neon. F34T12 have krypton and external conductive coating.

There are so many different fills, but the following basic listing is approximately correct for most manufacturers as far as I know:

T12, T8 and T5 standard : Pure argon, or sometimes argon with a very small percentage of neon and/or helium to tweak the voltage slightly.  The main exception is the British T12 8ft 100W which contains approx 25% Krypton in Argon.

T8 European energy saving tubes: Nearly all 25% Krypton, 75% Argon

T8 European extra energy saving: Still mainly argon but with varying percentages of krypton and/or even xenon.

T12 American energy saving tubes: Nearly all between 10-40% Krypton in Argon.

T12 High Output: Argon, sometimes with very small trace of neon or helium

T12 Very High Output: Usually Argon with quite high percentage of Neon and/or Helium, to raise the voltage drop and facilitate high power dissipation from low current cathodes, while also improving efficacy under high discharge current conditions.

T5 Long High Efficacy : Usually pure argon for the short tubes, and argon with between about 3% and 11% Krypton for the longer lamps.

T5 Long High Output : Argon with up to about 40% neon or neon-helium added in varying quantities, for similar reasons as in T12 VHO types.

T5 low current emergency lighting types : Argon + small amount of carbon dioxide

In all cases the pressure is low, usually between about 1 and 4 torr.  There is not a consistent trend of pressure per lamp type, this can depend on the tube length / current rating.

If there is 40% neon or neon-helium in argon in T5 HO, why I've never seen a red glow discharges at the ends of them?

Usually because there is mercury vapour present and its discharge colour overpowers that of the gasfilling.  If you place the lamp in a freezer below about -40C and remove the mercury vapour, and ionise the gas filling not too strongly, then you can see the neon discharge colour.

If there is 40% neon or neon-helium in argon in T5 HO, why I've never seen a red glow discharges at the ends of them?

looking at an official manufacturing chart I happen to have for the fill gas and pressures of T5 tubes, only the 24W and 39W HO types are Half Neon filled, the 54W 49W and 80W are still Pure Argon, and I think most of the T5 HO tubes you have looked at have been 54W ones?

(although of course there could still be manufacture to manufacture variation)

T5 low current emergency lighting types : Argon + small amount of carbon dioxide

That's interestin. What function does the carbon dioxide has in these lamps?

looking at an official manufacturing chart I happen to have for the fill gas and pressures of T5 tubes, only the 24W and 39W HO types are Half Neon filled, the 54W 49W and 80W are still Pure Argon, and I think most of the T5 HO tubes you have looked at have been 54W ones?

(although of course there could still be manufacture to manufacture variation)

There are two 54W T5 HO lamps at my floor at my hostel. My father have two 24W T5 HO lamps in his room. Supermarkets here, used to have 49W, 54W or 80W T5 HO lamps.