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Hitachi F8T5/CW

Hitachi F8T5/CW

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I got six of these, brand new, very generously donated from user ultralume. I really appreciate it. The only 8 watt lamps I've had for the longest time were my vintage ones, so it's nice to have some modern ones that I can play around with. I've put two in the Ash Flash Discoverer V, and I'll use one for experiments if I ever need to. And I'll have three new ones remaining. The six of these lamps will perhaps last me the rest of my life...!

These are really nice lamps. They're very bright, and they have a nice color, slightly cooler than your usual cool white. These lamps were also tested by ultralume to be completely happy running on DC current.

These lamps all came in sleeves which read "Hitachi Lighting, Ltd. Tokyo, Japan".

IMG_1257.JPG IMG_1241_2.jpg IMG_1213.JPG IMG_1199.JPG

Light Information

Light Information

Manufacturer:Hitachi
Model Reference:F8T5-Cool White
Lamp
Lamp Type:F8T5
Electrical
Wattage:8
Optical
Color Temperature:Cool white
Physical/Production
Factory Location:Japan
Application/Use:Two for Ash Flash Discoverer V, one for floating use, three put away.

File information

File information

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Filename:IMG_1213.JPG
Album name:themaritimegirl / Fluorescent lamps
Keywords:Lamps
File Size:205 KB
Date added:May 31, 2014
Dimensions:2050 x 1449 pixels
Displayed:214 times
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ultralume
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Jun 01, 2014 at 03:21 PM Author: ultralume
I like these. Can't beat the price....
Alights
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USA (120V 60HZ)


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Jun 01, 2014 at 08:37 PM Author: Alights
These lamps are top notch! I have a few somewhere in various sizes
themaritimegirl
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Florence


themaritimegirl themaritimegirl themaritimegirl
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Aug 04, 2014 at 06:22 PM Author: themaritimegirl
Unfortunately, I've accidentally killed one of these lamps. I was experimenting with running three 8 watt lamps in series on my 30/40 preheat ballast. That in itself was fine, but at one point my hand slipped when I was preheating one of the lamps, and one cathode got the full current of the ballast, and blew open. The lamp itself was still fine, so I threw on the Fulham to see if running it would weld the cathode back together. I guess the cathode was rendered useless by the accident, as the Fulham fried the lamp in under a minute. Doh...

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ultralume
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Aug 05, 2014 at 08:51 PM Author: ultralume
Trent, I think it's time to take lamp frying to the next level........lamp explosions. I want to use the HV DC power supply from a 12 KW RF generator, capable of producing over 6000V DC at several amps of current, continuous duty. I suspect that discharging the bank of DC filter capacitors followed by sustained current will cause rapid heating and pressure increase sufficient to make a lamp explode.

I also have huge plate transformers from other RF generators. The transformers alone without rectifiers and filter caps probably produce enough voltage and current to explode lamps, perhaps three at once. The lamps can be wired in a three phase delta configuration to the transformer secondary while switching power on to the primary via a contactor.

Next time you're in New York, we should try it........
themaritimegirl
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Aug 05, 2014 at 09:05 PM Author: themaritimegirl
A member here actually used a similar apparatus on a lamp which generated 12Kv at a few hundred milliamps. The lamp ended up losing vacuum as usual, but the 12Kv was able to sustain an arc across the tube, which melted it into a puddle of glass. You can see it here:

https://www.youtube.com/watch?v=51brIRsJ3aU

I imagine it may be difficult to get an explosion out of one because the ends will heat up and the glass will crack before the pressure gets too high, but who knows.

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TheUniversalDave1
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Aug 05, 2014 at 09:22 PM Author: TheUniversalDave1
Why not just connect the lamp straight to 120 volt power?

"If people only knew how much I secretly hated them, they'd love me for holding it in." -Matt Groening

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Aug 05, 2014 at 09:26 PM Author: themaritimegirl
You'd have to preheat the lamp, and as soon as you try to do that the cathodes blow to smithereens, and the lamp won't ignite. Now, if you started the lamp on a ballast, and then shorted out the ballast, you might get some action, although I doubt you'd get much since you only have 120V, and the lamp would extinguish before anything exciting happened.

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TheUniversalDave1
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Aug 05, 2014 at 09:30 PM Author: TheUniversalDave1
I suppose that wouldn't be as exciting as the video above.

"If people only knew how much I secretly hated them, they'd love me for holding it in." -Matt Groening

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Sep 21, 2014 at 09:34 AM Author: TL8W
MFD July 2011 (possibly July 2006 if the etch had changed by then). Hybec's five-year refresh dating system makes for difficult dating!

We do not have to agree on anything to be kind to one another. The ability to be civil is available to everyone on earth, for free.

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Sep 21, 2014 at 10:57 AM Author: themaritimegirl
Hybec? Did Hitachi not make their own lamps?

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Binarix128
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220V AC 50Hz


UCOUT2noI2R__jgPSJUjGRtA
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Jul 11, 2019 at 02:04 PM Author: Binarix128
I recently bought a F15T8 hitachi tube, I never seen this brand before.

My F15T8 have the same end cap color!

-I dont speak English very well. Compact Fluorescent (PL)
-Say NO to incandescent bulbs ban! Incandescent Lamp
-lamp saver Mercury Vapor Lamp

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