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Phillips Alto Mistake?

Phillips Alto Mistake?

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So on my F40T12 DX tube (the one that is pictured here) seem to be normal when looked at.
So I got curious onto why the etched end started blackening first, because from what I've heard PHILLIPS Alto tubes have cathode guards. Yes, mine do have A cathode guard.
All this time when I bought Phillips fluorescent tubes I thought that both sides had cathode guards but today when I put a flashlight under the tubes, I checked both ends and what you see in the picture is what I saw (sorry if you can't see the bottom one)
I figured, if you can see one cathode guard you can definitely see the opposing one.
Is this a common problem with Phillips tubes or is it how they are produced?
Yes, I know the phosphor is thin on the side which you can see the cathode guard in but the other side you would at least see a shadow of the whole thing. Look closley at the bottom pic, you will see one arm to hold the filament but the cathode guard is missing, you would see it if it was there
No, I didn't knock the guard off or it knocked itself off because I would hear it rattling in the tube.
Hopefully somebody will know why this happened here or on THIS THREAD

youtube_7Y9NBN49EVo.jpg D017B767-3244-4E79-912C-7B8D1E984679.jpg 0DEF24DE-B069-44E3-A87A-D5CD7ADE605A.jpg IMG_0418.JPG

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Date added:Jul 12, 2018
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RCM442
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Jul 12, 2018 at 09:39 AM Author: RCM442
Philip's doesn't use guards anymore. They were putting just one in to hold the mercury capsule for dosing, which is what you are seeing here. They have completely removed them now. As I have some brand new ones with no guards.

Linear fluorescent will never lose to LED!
I am not Anti-LED, as I have some in use at my house.
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Jul 12, 2018 at 10:26 AM Author: rjluna2
My guess that they stop using the cathode guard to save money during production

Pretty, please no more Chinese failure.

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Jul 12, 2018 at 10:33 AM Author: Lightingguy1994
@RCM442

So they aren't using the mercury capsule anymore, does this mean the tubes may have a more reliable mercury dosing now since I would assume they are dosing these in the traditional method ? Its worth hoping lol. I would consider buying some Altos if they have improved

@F96T12 DD VHO

I can confirm that there is only one in each tube. Most of my ALTO's I have only have the one.
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Jul 12, 2018 at 11:44 AM Author: suzukir122
Hmm... so is this mainly the case with the larger tubes? (F40-F96) This *seems* not to be the case with the
smaller lamps... like the F15T12's and T8's... although I'm not sure about the F20's. The Philip Alto F15T8 I
got from Home Depot a little more than a year ago, seems to have shield guards on both ends.

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Jul 12, 2018 at 12:42 PM Author: High Intensity
@suzukir122: I checked a new Philips Alto F20T12 lamp i had to see if this was the case and it only has one guard.

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

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Jul 12, 2018 at 03:48 PM Author: ace100w120v
I have some fairly new (2018) Philips F96T12/DX with the new etch that have a guard on one end. Granted they are F96T12 slimlines so I may be comparing apples to oranges...
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Jul 12, 2018 at 11:29 PM Author: Lightingguy1994
F96T12 DD VHO - One more thing... Pick yourself up a good laser pointer - green is recommended, it is great for seeing the electrodes of lamps clearly. Also works for viewing the arctubes of coated HID lamps and incandescents. Shine the dot on the lamp near the electrode and it will project a clear crisp shadow of the electrode onto the bulb wall. I use it for seeing if electrodes are damaged or if there is a guard. I just did it to a MV lamp to make sure the arctube was clear and it was
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Jul 13, 2018 at 10:29 PM Author: Men of God
佛山的也在取消防护装置,中国飞利浦我不太懂是否也取消了,美国GE的是没有...

我不会英文,所以我用中文,请你们用翻译网站翻译我打的字!

I can't in English, so I in Chinese, please use the translation website to translate my words!

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Jul 14, 2018 at 12:04 PM Author: RCM442
Ah yes, forgot to follow up on this, the T8s still have guards.

Linear fluorescent will never lose to LED!
I am not Anti-LED, as I have some in use at my house.
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Go on, arcs me.


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Jul 14, 2018 at 02:45 PM Author: Cal

F96T12 DD VHO - One more thing... Pick yourself up a good laser pointer - green is recommended, it is great for seeing the electrodes of lamps clearly. Also works for viewing the arctubes of coated HID lamps and incandescents. Shine the dot on the lamp near the electrode and it will project a clear crisp shadow of the electrode onto the bulb wall. I use it for seeing if electrodes are damaged or if there is a guard. I just did it to a MV lamp to make sure the arctube was clear and it was


The LED flash of a smartphone also works in a similar way.

http://www.lighting-gallery.net/gallery/index.php?cat=11976

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Jul 14, 2018 at 08:20 PM Author: suzukir122
^^^Yep I definitely agree with Cal as well. I use the LED flash with my old HTC One android phone, when I'm checking electrode filament details.
The flash is very bright.

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Jul 14, 2018 at 10:49 PM Author: Lightingguy1994
I was doing that at first but found it easier with my green laser
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Jul 14, 2018 at 10:54 PM Author: suzukir122
Yep I could definitely understand using a laser though. Honestly I would recommend using a laser more so than
a phone flash... but I used the phone flash since it was the only sharper light source I could find and use instantly.
Speaking of lasers, is there a laser out there that anyone knows of, that uses white light?

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3. Severe Thunderstorms of all kinds
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Jul 14, 2018 at 10:57 PM Author: Lightingguy1994
Not that I know of, but I have a cube prism from an old 3LCD projector and I have 3 lasers, R, G ,B so I positioned them just right at the prism and made white light lol. If there was a way I could fix them like that it would be awesome
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Jul 14, 2018 at 11:24 PM Author: Lightingguy1994
I tried my phone flash on a coated mv lamp since i havent before on those and it works good for seeing the arc tube. So definately can get by on phone flash if needed
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Jul 14, 2018 at 11:45 PM Author: suzukir122
Yep although it might still appear a little blurry compared to a laser, it's still not a bad secondary choice if you
want to see the details of a coated HID, Sodium or MV lamp, or the filament within a fluorescent lamp.

Interests
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2. Weighting/staying extremely athletic
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Jul 15, 2018 at 03:28 AM Author: Cal
The problem with using a laser for this is, if it slips and goes in your eye, you’re in trouble. Most of the green laser pens that you find on eBay etc are actually way more powerful than advertised, above 5mW, and are not “eye safe”.

If you can see the beam it isn’t eye safe, in fact I’ve a couple you can see the beam of that will burn things if you focus it enough.

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Jul 15, 2018 at 05:49 AM Author: F96T12 DD VHO

The problem with using a laser for this is, if it slips and goes in your eye, you’re in trouble. Most of the green laser pens that you find on eBay etc are actually way more powerful than advertised, above 5mW, and are not “eye safe”.

If you can see the beam it isn’t eye safe, in fact I’ve a couple you can see the beam of that will burn things if you focus it enough.

There is a solution to that, get laser glasses that match that wavelength. They may be a bit pricey to find a good pair but it's better than loosing your sight
I have a pair for a red lasers that I bought from Amazon , they may be a bit pricey but they work like a charm and has saved my sight from when may lasers actually worked

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Jul 15, 2018 at 08:40 AM Author: Lightingguy1994
I never aim the laser towards me. When viewing a lamp with a laser i always aim it off angle from my face and keep the lamp lower than my face level. Ive never had issues.

As for lasers burning stuff you are correct, my violet laser burns stuff when batteriess are fresh so i put a lens cap device on it to make the beam spread out like flashlight and i use that as a blacklight torch
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