With MH, they generally only really fail explosively after many failed starting attempts. They will cycle just like HPS does, and the heat stress that the constant heating and cooling creates weakens the structure of the lamp. This weakening eventually causes the arc tube to rupture when it reaches a high enough internal pressure. They can sometimes, although due to high manufacturing tolerances, this is rare, fail during normal operation due to imperfections in the arc tube, but again, this is quite rare in modern MH lamps, especially ceramic ones as the good quality ones are very strictly tested and monitored in production to make sure they can't fail during normal operation.
Yep! Thanks for the info! But as I am filming in my room and very close to the bulb, I really don't want to take the risk of the danger of "but sometimes.." 😅
@@THEBULBHOME That's true. Plus, you don't know how many times that lamp has been switched... Best to keep it running in an enclosure that can contain a failure should one occur even if the chances of it happening are slim.
@@TheSoxmania True! As far as I know it was located on a luminaire on factory, having burning cycles of about 10-12 hours, so yeah, it saw a lot of usage! But anyway, we have it on video now so we can get a glimpse of how the bulb works :D
Orange spark is the internal ignitor, its normal! i have an extremely worn mbfu lamp which i have to put in the garage every so often for the mercury to reset, and it does this. Cosy lamp!
The lamp will eventually go out and refuse to strike an arc. I had a 175 watt MH in a horizontal fixture go bad after a couple of years or so. The light output slowly diminished to the point the lamp would not light. New bulb solved that problem.
The glow at the ends is normal somewhat, i have a brand new phillips that done the same thing, its the halides glowing under the white coated ends. And they are usually ok as long as its not getting hard to strike, once it gets that manybhours on it id keep that lid closed. Alot of times it doesnt even explode the bulb just the arc tube but i wouldnt chance it, id keep at least something in from of it. Good video, thanks.
The Metal-Halide fixture needs a new bulb. The arc tube was old and that's why the lamp failed to start. Good thing the arc tube didn't explode at the end of life.
It's just part of my collection... I have tons of other MH bulbs that can go there, but I just wanted to make an experiment and see if one of my older bulbs worked!
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It's definitely had a lot of hours of use. My HPS is starting to blacken the ends, but it still has low hours.
Yes! Used to be on a huge factory in Naucalpan, Mexico City, working for at least 20 hours every day!
I run one off a high voltage generator and it never gets warm or blacken
Great. Keep on making these videos. I love your channel
Thank you, mate! So glad you like my content!
With MH, they generally only really fail explosively after many failed starting attempts. They will cycle just like HPS does, and the heat stress that the constant heating and cooling creates weakens the structure of the lamp. This weakening eventually causes the arc tube to rupture when it reaches a high enough internal pressure.
They can sometimes, although due to high manufacturing tolerances, this is rare, fail during normal operation due to imperfections in the arc tube, but again, this is quite rare in modern MH lamps, especially ceramic ones as the good quality ones are very strictly tested and monitored in production to make sure they can't fail during normal operation.
Yep! Thanks for the info! But as I am filming in my room and very close to the bulb, I really don't want to take the risk of the danger of "but sometimes.." 😅
@@THEBULBHOME That's true. Plus, you don't know how many times that lamp has been switched... Best to keep it running in an enclosure that can contain a failure should one occur even if the chances of it happening are slim.
@@TheSoxmania True! As far as I know it was located on a luminaire on factory, having burning cycles of about 10-12 hours, so yeah, it saw a lot of usage! But anyway, we have it on video now so we can get a glimpse of how the bulb works :D
Orange spark is the internal ignitor, its normal! i have an extremely worn mbfu lamp which i have to put in the garage every so often for the mercury to reset, and it does this. Cosy lamp!
The lamp will eventually go out and refuse to strike an arc. I had a 175 watt MH in a horizontal fixture go bad after a couple of years or so. The light output slowly diminished to the point the lamp would not light. New bulb solved that problem.
I am planning on running it once more to see if I can succeed on turning it on!
The glow at the ends is normal somewhat, i have a brand new phillips that done the same thing, its the halides glowing under the white coated ends. And they are usually ok as long as its not getting hard to strike, once it gets that manybhours on it id keep that lid closed. Alot of times it doesnt even explode the bulb just the arc tube but i wouldnt chance it, id keep at least something in from of it. Good video, thanks.
Thank you! I am thinking of giving it another try but with the lens closed just in case something funny starts to happen!
The Metal-Halide fixture needs a new bulb. The arc tube was old and that's why the lamp failed to start. Good thing the arc tube didn't explode at the end of life.
It's just part of my collection... I have tons of other MH bulbs that can go there, but I just wanted to make an experiment and see if one of my older bulbs worked!
Ooo my buddy has the same exact street light fixture. A GE M400A
Does he have videos of it?
cool