High pitch whine from Phoenix 250 w de

Mj75 · 09/02/2016, 10:00 AM

Hello all. I picked up a used 250x w Giesmann Infiniti and replaced the bulbs with 2 new Phoenix bulbs. I noticed there's a high pitch sound coming from one of the bulbs and not from the ballast. It would let go away even after 30 mins of being lit. I tried re seating and flipping the bulb and it still whined. I finally switch the bulbs around and the same bulb was buzzing on a different spot. Is this a bad bulb? Or it just needs to break in more? The seller offered to replace the bulb but mentioned bad bulbs are very rare.

alton · 09/02/2016, 02:54 PM

If you have swapped the lamps around and one makes noise no matter which fixture or ballast, I would send it back. Yes you can have new lamps that are bad. Most never check the PAR reading on a new lamp, I have and found two Radiums that were 10% less than the lamp they replaced that was 16 months old.

Mj75 · 09/02/2016, 05:17 PM

Quote:

Originally Posted by alton

If you have swapped the lamps around and one makes noise no matter which fixture or ballast, I would send it back. Yes you can have new lamps that are bad. Most never check the PAR reading on a new lamp, I have and found two Radiums that were 10% less than the lamp they replaced that was 16 months old.

Thank you. This is my first MH fixture and I was worried the ballast/fixture was at fault.

09/02/2016, 10:00 AM	#1
Mj75 Registered Member Join Date: Jun 2011 Posts: 75	High pitch whine from Phoenix 250 w de Hello all. I picked up a used 250x w Giesmann Infiniti and replaced the bulbs with 2 new Phoenix bulbs. I noticed there's a high pitch sound coming from one of the bulbs and not from the ballast. It would let go away even after 30 mins of being lit. I tried re seating and flipping the bulb and it still whined. I finally switch the bulbs around and the same bulb was buzzing on a different spot. Is this a bad bulb? Or it just needs to break in more? The seller offered to replace the bulb but mentioned bad bulbs are very rare.

09/02/2016, 02:54 PM	#2
alton Registered Member Join Date: Jan 2005 Location: Zuehl, Texas Posts: 4,460	If you have swapped the lamps around and one makes noise no matter which fixture or ballast, I would send it back. Yes you can have new lamps that are bad. Most never check the PAR reading on a new lamp, I have and found two Radiums that were 10% less than the lamp they replaced that was 16 months old.