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F30t8 3 lamper t8

F30t8 3 lamper t8

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These Are some daylight tubes I had got from leominster I don't want to kill my classics.

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Filename:20190201_135153.jpg
Album name:veryhighonoutput / F40
Keywords:Lamps
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Date added:Feb 01, 2019
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Date Time:2019:02:01 13:51:53
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streetlight98
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Mike McCann


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Feb 02, 2019 at 01:31 PM Author: streetlight98
Definitely! Use these things and save the golden oldies! Any Chinese lamp looks nice if it's daylight.

To resist is to piss in the wind, anyone who does will end up smelling.

veryhighonoutput
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T12


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Feb 02, 2019 at 03:48 PM Author: veryhighonoutput
Right China lamps not too bad but I'll run a quick thru the oldies just for fun

T12/ t17 there's a reason they made heavy magnetic ballasts

sol
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Feb 02, 2019 at 07:14 PM Author: sol
I believe you can run F25T8 lamps on these ballasts. I mean the full wattage 3foot ones. Then you can have a nice CRI with commonly available lamps without changing anything else.
veryhighonoutput
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T12


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Feb 02, 2019 at 07:40 PM Author: veryhighonoutput
I wonder if I could run f30t12 lamps? If they would be underdriven?

T12/ t17 there's a reason they made heavy magnetic ballasts

sol
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Feb 02, 2019 at 07:54 PM Author: sol
I’m not sure on that one.
don93s
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Feb 02, 2019 at 08:36 PM Author: don93s
F30T12 lamps have a less arc voltage than F30T8. Some ballasts may be more stressed than others when going from the 30w T8 to T12. The 30T12 wouldn't be under-driven, most likely, though.
streetlight98
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Mike McCann


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Feb 02, 2019 at 09:58 PM Author: streetlight98
Running an f30t12 on a f30t8 fixture is like running an f34t12 on an f40t12 ballast. As long as the ballast doesnt get too hot it's ok but better not to use them.

To resist is to piss in the wind, anyone who does will end up smelling.

Lightingguy1994
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Feb 02, 2019 at 10:54 PM Author: Lightingguy1994
Are F25T8 and F30T8 the same lamps ? and can they be interchanged?
xmaslightguy
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^homebuilt fixture


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Feb 02, 2019 at 11:35 PM Author: xmaslightguy
@Lightingguy1994:
No, they're different.
I think its somewhat like comparing a F32T8 to a F36T8

On a electronic ballast interchanging wouldn't really matter (the F30 lamp would be a bit underdriven)...
But on a vintage HPF ballast the F25T8 may overdrive/overheat the ballast (just like a F32T8 can do to a ballast designed for F40T12/F36T8)

Colored Fluorescent's such as F40T12 Red or  Green or Blue are awesome...

Powergroove
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Feb 03, 2019 at 07:45 AM Author: Powergroove
Most ballast list F30T8 and F30T12. What ballast is in the fixture?

Keep government out of the lighting industry.

veryhighonoutput
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T12


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Feb 03, 2019 at 10:40 AM Author: veryhighonoutput
It's 3 single lamp Jefferson long black ballasts with description of wiring and states only f30t8

T12/ t17 there's a reason they made heavy magnetic ballasts

sol
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Feb 03, 2019 at 11:57 AM Author: sol
I always thought F25 lamps were the same as F30 lamps only rated differently because the F25 are intended for electronic ballasts. Sort of like F40 shop light lamps that are rated at 25 watts.
veryhighonoutput
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Feb 03, 2019 at 12:21 PM Author: veryhighonoutput
Oh yeah those 25 watt f40 lamps I used to be confused why they ran the same in a f40 fixture. But the reason is those belong in a cheap low power shop light fixture.

T12/ t17 there's a reason they made heavy magnetic ballasts

streetlight98
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Feb 03, 2019 at 04:03 PM Author: streetlight98
From what I understand, the F30T8 and F40T12 are electrically similar. And F30T12 and F34T12 are electrically similar.

To resist is to piss in the wind, anyone who does will end up smelling.

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Feb 03, 2019 at 04:20 PM Author: don93s
The F30T8 and F25T8 have similar arc voltages but the F30T8 has a higher current rating and preheat designed electrodes. That being said, an F25T8 shouldn't hurt a F30T8 ballast...but may be a bit hard on the lamp.
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