Why 400w hps bulbs bend ?

[snakedope]

So I got these 400w philips hps bulbs not so long ago, they are running perfect but I noticed that after a few days of working the inside wire that runs along the arc tube is bent towards the glass of the bulb, kinda touching it and leaving a burnt mark on the glass, also the entire construction inside looks crooked and bent... They were perfectly fine when I bought them.. funny thing is I have 250w and 600w of philips also but they never do that.. only the 400w, all of them.

Anyone seen this before and can elaborate ?

 

[goingrey]

Does it also have a scratch on the glass at the bend?

That is not good.

I don't know how many "all of them" is but if it's more than two I would switch brands.

 

[Hammerhead]

It's def from the heat.. They shouldn't bend that much. Curious if there are fake Phillips bulbs?.. Phillips is one of the largest bulb manufacturing companies there is. They make good quality bulbs.

 

[snakedope]

I bought more then 10 unites of these 400w, maybe they are from a bad batch or some, I do know they were sitting at the hydro shop for couple of years probably..
When I said all of them I mean all of the 400 bulbs I bought do it, some worse and touch the glass and some just bend and don't touch the glass, yet.

Very weird, I know I haven't seen anything like this before so it's kinda strange and I dunno if it's a hazard for the bulbs
They are still working fine...
Today I replaced the 3 x 400 in my 4x8 to 3 x 600 philips also, I'll wait and see if it happens to them also.

 

[snakedope]

Does it also have a scratch on the glass at the bend?

Doesn't seem to have any outside damage...
Maybe on the inside but it's not visible now cuz it burnt the glass
I do remember they were perfect when I bought them, I always take them off the box and rattle them a but to see if they are solid or broken

 

[Crowmax]

FIrst time i see HPS lamp be like this with normal usage...never had one like this or anyone of my close friends.
I wouldn't risk running those not even 1 more hour...

 

[goingrey]

It's def from the heat.. They shouldn't bend that much. Curious if there are fake Phillips bulbs?.. Phillips is one of the largest bulb manufacturing companies there is. They make good quality bulbs.

I think I saw somewhere that Philips makes nothing but beard trimmers nowadays. For everything else they just license their name to other manufacturers. But there are def also counterfeits: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-207462

Doesn't seem to have any outside damage...
Maybe on the inside but it's not visible now cuz it burnt the glass
I do remember they were perfect when I bought them, I always take them off the box and rattle them a but to see if they are solid or broken

In the photo it looks like a scratch but I guess it's just the way it burned.

 

[Hammerhead]

I think I saw somewhere that Philips makes nothing but beard trimmers nowadays. For everything else they just license their name to other manufacturers. But there are def also counterfeits: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-207462


In the photo it looks like a scratch but I guess it's just the way it burned.

PHILLIPS has many different divisions. I use a Phillips beard trimmer. They even make electric toothbrushes lol.

GreenPower LED Lights for Horticulture | Philips lighting

Choose from our products to let your crop grow

www.lighting.philips.com

Professional LED grow lights | Philips lighting

Signify, the world leader in lighting, offers Philips horticulture LED grow lights, cutting edge innovations to help growers improve their crops and business results.

www.lighting.philips.com

 

[goingrey]

lol, PHILLIPS has many diffranerant divisions.

Sustainable LED lighting solutions | Philips lighting

Philips is a world-leading lighting brand that provides sustainable commercial lighting solutions. Efficient, high quality LED luminaires, lamps, and tubes for B2B.

www.lighting.philips.com

When I heard about it they were talking about TVs but it is indeed true for lamps as well. Philips Lighting is since 2016 a actually company called Signify N.V. Don't know if they manufactured this bulb. It does say made in Belgium, but so did the Chinese counterfeit I posted a link to earlier.

Signify N.V. - Wikipedia

en.wikipedia.org

 

[Three Berries]

That will really shorten the life as it will eventually crack the glass. Definitely defective if you can get a return.

 

[snakedope]

But how come all defective ?
And especially the 400w...
Maybe they are getting too hot in the cool tubes for their own good ?
My 3 x 600 start in a couple of hours so we'll see if they deform also
I have another op with a 400 in a open classic hood and the bulb bent aswell, not like the one in the pic, but getting there, so the cool tubes option is not looking like the culprit
I guess they are just defective batch or some, hard to believe but I see no other explanation

 

[Three Berries]

But how come all defective ?
And especially the 400w...
Maybe they are getting too hot in the cool tubes for their own good ?
My 3 x 600 start in a couple of hours so we'll see if they deform also
I have another op with a 400 in a open classic hood and the bulb bent aswell, not like the one in the pic, but getting there, so the cool tubes option is not looking like the culprit
I guess they are just defective batch or some, hard to believe but I see no other explanation

My guess is counterfeit. Phillips is usually a good name bulb.

 

[Hash Artist]

I blame LED

 

[bloyd]

Oh the irony.

 

[moses wellfleet]

But how come all defective ?
And especially the 400w...
Maybe they are getting too hot in the cool tubes for their own good ?
My 3 x 600 start in a couple of hours so we'll see if they deform also
I have another op with a 400 in a open classic hood and the bulb bent aswell, not like the one in the pic, but getting there, so the cool tubes option is not looking like the culprit
I guess they are just defective batch or some, hard to believe but I see no other explanation

Can you post pictures of the lamps please?

 

[snakedope]

They are rather cheap here, although they sell the 400w for more then the 600w, weird shit

With the 600 and 250 I don't see problems,
But now that I think about it I bought the 600w 400v version from ebay, and the 250w I can't remember if it's a philips or not.

Now I'm even more suspecios of these cats, only their bulbs deform, and they are dirt cheap when they sell rather high on ebay..
I'm just used to buy all hid hardware for dirt cheap ever since LEDs kicked into high gear, so I didn't think any of it (counterfeit)

Yeah I will post pics of all the 400w bulbs when I'm near them np

 

[snakedope]

The 3x600 I've put today are from the same vendor, price was way too low lol
But everything else seems legit
If it happens to the 600w that I bought from him then we will know.

 

[WHIPEDMEAT]

typically bend or bow because of uneven heating that occurs during use. One side of the bulb can become hotter than the other, which can result in uneven expansion of the gas inside the lamp. The bulb can also bend due to vibration, which can happen if it is not properly secured or if there is too much movement around it. Proper installation and positioning of the bulb can help reduce the likelihood of it bending, and regular maintenance and cleaning can also help extend its life.

 

[Hammerhead]

If you can orient the bulbs so the metal is down so it bends towards the glass and not the arc tube.,

 

[Three Berries]

Some bulbs aren't meant for horizontal mounting. They will have a letter on them. Usually a U for universal.

U = universal burn

BD = base down burn

BU = base up burn

HOR = horizontal burn