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GE 85 watt mercury Lab-Arc lamp

GE 85 watt mercury Lab-Arc lamp

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GE made two different versions, one with regular hard glass the other with a UV transmitting glass. This lamp is the former, so if I light it my eyes and skin will be fine. The arc tube electrodes are in their own separate chambers, with small holes at the tips for the arc to form. The lamp life was a measly 500 hours! Ballasting one will be hard because it has a high operating voltage at about 250v. I can think of possibly devaluing a 1000w mercury ballast with low value capacitors to make it drive a lamp at 85w but it’d be a very lossy system.

44A21262-23AB-4685-BE0C-03DECB369939.jpeg 6E5C7F32-3EC6-4DC6-9D8D-5DC7C23FCD8C.jpeg A28B3F39-29B3-4667-9C23-45987578C567.jpeg 228AB6EA-3DBC-4A16-AAE6-CBF0A9DEB886.jpeg

Light Information

Light Information

Manufacturer:General Electric
Model Reference:H85A3
Lamp
Lamp Type:Mercury Vapor
Filament/Radiator Type:Quartz arc tube
Base:Admedium
Shape/Finish:T10
Service Life:500 hours
Electrical
Wattage:85w
Optical
Color Temperature:6000K
Color Rendering Index:15
Physical/Production
Factory Location:Nela Park, Ohio USA
Fabrication Date:1950s.

File information

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Album name:silverliner / good ol' mercury vapor
Keywords:Lamps
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Date added:May 02, 2020
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Date Time:2020:05:02 15:29:56
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Bulb Freak
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May 02, 2020 at 06:23 PM Author: Bulb Freak
id think a medium power slimline F96T12 ballast would probably drive one of these pretty well

(these 85W mercs run at 250V 380Ma which is not far off the 460Ma 190-195V~ a F96T12 runs at, I imagine if you found a not so full power F96T12 ballast that ran the tubes at 380-400ma you would probably be golden )

My other hobby is buses, especially the Routemaster

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EYE 175w MV


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May 02, 2020 at 06:42 PM Author: High Intensity
Cool, i have the UV version of this lamp.

Old lighting is, and will always be, the best lighting.

James
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May 03, 2020 at 01:11 AM Author: James
Nice find! What you can also do to run these is take an H35 ballast and add another one or two smaller choke-type HPS35W ballasts in series with its output.
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May 03, 2020 at 01:11 AM Author: James
Nice find! What you can also do to run these is take an H35 ballast and add another one or two smaller choke-type HPS35W ballasts in series with its output.
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May 03, 2020 at 01:32 AM Author: Silverliner
James thanks! Have you had the chance to contact me? I gave you my email address.

Administrator of Lighting-Gallery.net. Need help? PM me.

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Power company: Southern California Edison.

Silverliner
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May 03, 2020 at 01:33 AM Author: Silverliner
James thanks! Have you had the chance to contact me? I gave you my email address.

Administrator of Lighting-Gallery.net. Need help? PM me.

Member of L-G since 2005.

Collector of vintage bulbs, street lights and fluorescent fixtures.

Electrician.

Also a fan of cars, travelling, working out, food, hanging out.

Power company: Southern California Edison.

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May 03, 2020 at 01:39 AM Author: James
It has been busy Dave, I will write later today
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May 03, 2020 at 01:39 AM Author: James
It has been busy Dave, I will write later today
Bottled lightning
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May 03, 2020 at 01:54 AM Author: Bottled lightning
Won’t that increase the lamp current, at least until the chokes saturate? In my experience in order to adapt cwa ballasts to significantly smaller lamps you need to use a smaller capacitor and add more series inductance. I tried to run an h38 lamp off an h39 ballast just by using a smaller capacitor and I got the correct lamp current but it was dim and didn’t warm up all the way until I added an extra hps choke.
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May 06, 2020 at 11:11 AM Author: Bottled lightning
I wonder if this is the correct ballast https://www.ebay.com/itm/PBL-Intl-Labsource-SL-100-Ultra-Violet-Spectral-Lamp-Power-Supply-TESTED/272493500962
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