Author Topic: Non passive metal halide lamp failure sets low bay fixture on fire  (Read 15145 times)
WorldwideHIDCollectorUSA
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Non passive metal halide lamp failure sets low bay fixture on fire « on: October 27, 2025, 06:58:26 PM » Author: WorldwideHIDCollectorUSA
Anyone seen anything like this before?

https://youtube.com/shorts/xKejh6rIAqY?si=T4bclOKIAZ3UF5J9
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Desire to collect various light bulbs (especially HID), control gear, and fixtures from around the world.

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Re: Non passive metal halide lamp failure sets low bay fixture on fire « Reply #1 on: October 27, 2025, 07:24:00 PM » Author: Multisubject
Wow, that is impressive. I don't think that fire was likely to spread (unless the flaming plastic was dripping onto something flammable), but it was very close to a sprinkler which could heat up and go off. Not a fun situation, that could have been a lot worse.
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Lightingeye60
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Re: Non passive metal halide lamp failure sets low bay fixture on fire « Reply #2 on: October 25, 2026, 05:22:54 PM » Author: Lightingeye60
This is the reason why plastic refractors shouldn’t be used on MH fixtures. All MH fixtures should have a glass refractor. Assuming these were 250 or 400 watts.
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Re: Non passive metal halide lamp failure sets low bay fixture on fire « Reply #3 on: October 25, 2026, 05:23:49 PM » Author: WorldwideHIDCollectorUSA
Otherwise, these fixtures should use open rated lamps with arc tube shrouds.
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Desire to collect various light bulbs (especially HID), control gear, and fixtures from around the world.

DISCLAIMER: THE EXPERIMENTS THAT I CONDUCT INVOLVING UNUSUAL LAMP/BALLAST COMBINATIONS SHOULD NOT BE ATTEMPTED UNLESS YOU HAVE THE PROPER KNOWLEDGE. I AM NOT RESPONSIBLE FOR ANY INJURIES.

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Re: Non passive metal halide lamp failure sets low bay fixture on fire « Reply #4 on: October 25, 2026, 05:25:43 PM » Author: Lightingeye60
Yes, and I also think all metal halide fixtures should have a GLASS refractor. Using a plastic refractor on a metal halide fixture is stupid to begin with. Plastic refractors should only be used in MV or HPS fixtures or lower wattage.

But yes, using a protected lamp might’ve prevented this.
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dor123
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Re: Non passive metal halide lamp failure sets low bay fixture on fire « Reply #5 on: Today at 04:06:53 AM » Author: dor123
I thought all low bay fixtures are made from glass rather than plastic.
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