Forum: Lighting
04-25-18, 06:04 PM
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Replies: 23
Views: 21,694
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Forum: Lighting
04-25-18, 04:07 PM
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Replies: 23
Views: 21,694
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Forum: Lighting
04-24-18, 07:34 PM
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Replies: 23
Views: 21,694
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Forum: Lighting
04-24-18, 07:20 PM
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Replies: 23
Views: 21,694
But they do charge for apparent power.
The old...
But they do charge for apparent power.
The old electro mechanical meters will spin the same speed with a 140w 500va and a 500w 500va resistance load.
Some electronic meters I have seen collect "80%...
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Forum: Lighting
04-23-18, 01:34 PM
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Replies: 23
Views: 21,694
Apparent power includes the power supply...
Apparent power includes the power supply inefficiency.
That's why all my lumens per unit of power ratings usually includes apparent power not real power, when the power factor is less than ideal.
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Forum: Lighting
04-22-18, 04:27 PM
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Replies: 23
Views: 21,694
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Forum: Lighting
04-22-18, 09:48 AM
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Replies: 23
Views: 21,694
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Forum: Lighting
04-20-18, 06:41 PM
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Replies: 23
Views: 21,694
Got another commercial 120-277v F40T12 rapid...
Got another commercial 120-277v F40T12 rapid start ballast.
This time I put it in a 4 foot T5 fixture.
It works. The tube are doing about 44w each.
The old ballasts we only doing about 21w each....
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Forum: Lighting
03-18-18, 09:38 PM
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Replies: 23
Views: 21,694
It appears that I am getting a significant...
It appears that I am getting a significant improvement in light output taking a 34w T8 ballast that I was using on T8 tubes and using that ballast on T5 tubes.
The ballast was using the same amount...
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Forum: Lighting
03-14-18, 02:50 PM
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Replies: 23
Views: 21,694
I retried my T12 ballast to T8 tube experiment...
I retried my T12 ballast to T8 tube experiment again.
Got a free damaged 40w T12 high output rapid start fixture, with no tubes, only about 2 years old so I Figured the ballast was probably good.
I...
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Forum: Lighting
03-14-18, 08:51 AM
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Replies: 23
Views: 21,694
I got some pulled T8 fixtures with dead tubes,...
I got some pulled T8 fixtures with dead tubes, ballasts are good.
I took 2 new T8 tubes and stuck them in the fixture and they lit up with about 25 watts each. They look pretty dull, guess I'm just...
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Forum: Lighting
01-28-18, 03:00 AM
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Replies: 23
Views: 21,694
I tested it some more and found the T8 ballast...
I tested it some more and found the T8 ballast works pretty good in a fully enclosed fixture.
The ballast draws right about 1 amp, or 120 volt-amps, obviously sending up to 40w to each tube.
This...
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Forum: Lighting
01-27-18, 12:29 PM
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Replies: 23
Views: 21,694
I put the T8 ballast powered T5 fixture outside...
I put the T8 ballast powered T5 fixture outside with it around 25°F.
The tubes came right on, a little weak at first but warmed up after a few minutes, coming to full brightness much slower than a...
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Forum: Lighting
01-27-18, 02:32 AM
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Replies: 23
Views: 21,694
So I tried the T12 ballasts, I think they were...
So I tried the T12 ballasts, I think they were warn out, the ends got hot but the tube wouldn't come on.
So I pulled the T12 ballast out tossed it in the recycle bin.
Then wired up a T8 ballast...
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Forum: Lighting
01-26-18, 11:04 PM
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Replies: 23
Views: 21,694
Mixing ballasts and tubes
Do at your own risk.
Lethal voltage and current present in on energized systems.
But it seems to work. It all started where I work, had some T5 high output lights with burned out ballasts.
But our...
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