Author Topic: EYE mercury Vapour lamps vs NOS lamps  (Read 403 times)
HomeBrewLamps
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EYE mercury Vapour lamps vs NOS lamps « on: July 16, 2017, 12:52:11 PM » Author: HomeBrewLamps
which ones are better? is the modern day EYE mercury lamp comparable to the older mercuries made back in their heyday?
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Re: EYE mercury Vapour lamps vs NOS lamps « Reply #1 on: July 16, 2017, 10:47:14 PM » Author: BlueHalide
The older mercury lamps that seemingly lasted forever like the original "lifeguard" lamps had something done to them in order to achieve such incredibly long life, note that these lamps lasted as much as 3-4x longer than their 24,000h rating, while still emitting acceptable light levels well beyond the 24,000h mark. These lamps that ive removed from service over the years always have three things in common, a white (not blackened) arctube, a very skinny and elongate arctube, and electrodes nearly twice the size of modern lamps. 

The EYE lamps don't include any of the aforementioned features, they are simply just the highest quality produced today, their arctubes still blacken like all other modern lamps, however the EYE lamps will actually last the 24,000 hours unlike the chinese lamps. EYE mercury lamps I have installed in the past produce acceptable amount of light for about 7-8 years burning dusk to dawn (roughly 28,000 hours), after that they get very very dim.
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dor123
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Re: EYE mercury Vapour lamps vs NOS lamps « Reply #2 on: July 17, 2017, 12:38:13 AM » Author: dor123
I expects that EYE would still use the anti-blackening emitter in their lamps that turns the arctube white instead of black, like the Lifeguard. Lamps that uses the usual thorium emitter, tends to blacken very fast and so degrades in output very fast.
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Re: EYE mercury Vapour lamps vs NOS lamps « Reply #3 on: July 17, 2017, 07:29:45 AM » Author: Lumex120
The older mercury lamps that seemingly lasted forever like the original "lifeguard" lamps had something done to them in order to achieve such incredibly long life, note that these lamps lasted as much as 3-4x longer than their 24,000h rating, while still emitting acceptable light levels well beyond the 24,000h mark. These lamps that ive removed from service over the years always have three things in common, a white (not blackened) arctube, a very skinny and elongate arctube, and electrodes nearly twice the size of modern lamps. 

The EYE lamps don't include any of the aforementioned features, they are simply just the highest quality produced today, their arctubes still blacken like all other modern lamps, however the EYE lamps will actually last the 24,000 hours unlike the chinese lamps. EYE mercury lamps I have installed in the past produce acceptable amount of light for about 7-8 years burning dusk to dawn (roughly 28,000 hours), after that they get very very dim.
I noticed that the arctube in my Philips Lifeguard has a very thin, long arctube. It has almost no whitening on it but it is dimmer than a normal 175w clear lamp.
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Re: EYE mercury Vapour lamps vs NOS lamps « Reply #4 on: July 17, 2017, 09:12:17 PM » Author: BlueHalide
Every EYE mercury lamp ive removed had a blackened (not white) arc tube, I dont think any lamp maker uses that chemical that turns the arctube white anymore, I cant say ive seen it on any modern lamps.
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Re: EYE mercury Vapour lamps vs NOS lamps « Reply #5 on: July 21, 2017, 05:59:08 PM » Author: trencheel303
Probably because it wasn't financially viable! From what I've heard the lifeguard lamps lasted extraordinary lengths of time because of the aforementioned white emitter material that didn't cloud up the arc tube much. I'm lucky enough to have a lifeguard and it is definitely a prime example of engineering.

EYE lamps are quality though. I have some of the 50W clears and they're beautifully crafted, with a very conservative estimate of an 8,000 hour lifespan ... at which only 10% of failures occurred! The company also actually believes in mercury, and they have a document on their website saying so, which makes me confident they aren't just churning out lamps as a stopgap to pushing their customers to LED.
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Re: EYE mercury Vapour lamps vs NOS lamps « Reply #6 on: August 15, 2017, 03:52:36 AM » Author: dor123
Actually GE invented the emitter that turns the arctube white, and that used in the Westinghouse Lifeguard MV lamps, with their Bonus Line MV lamps: http://www.lamptech.co.uk/Spec%20Sheets/D%20MB%20GE%20BonusLine%20175.htm
Osram in Europe, also used this emitter that the Westingehouse Lifeguard MV lamps used, in their HQA and later in their HQL MV lamps: http://www.lamptech.co.uk/Spec%20Sheets/D%20MB%20Osram%20HQA125.htm
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I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I hope that LED won't replace all forms of other lighting.

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