Black bulbs

LJ · 03-25-2003, 08:29 PM

Hi, I bought at my Heartland beds in feb. All my bulbs are new. I have noticed that most all the bulbs have a little blackening at the end. my receptionist noticed and asked me if it was time to put new bulb in... HAHA... not with less than 100 hrs on each bulb...lol... cosmolux..
Anyway... I suppose this is normal because it is on all the bulbs... I will call Heartland tomorrow if you all tell me it is NOT right... thanks!

BooBop · 03-25-2003, 09:22 PM

This is normal. Usually happens with the first few light ups.

Roger a. Brown · 03-26-2003, 10:54 AM

LJ:

Check your voltage across both hot lead. I do not know what the requirements are for those units. It appears that it is either high or low causing "flashing in the filiments.

If I may assist, please contact me.

Roger A. Brown
puretan Intl.
800-338-8267 X201/rogerb@puretan.net

lampman · 03-26-2003, 11:10 AM

What starter is being used?There were some beds put out with K-11 or S-11.These starters are known to cause problems.

Tan Talker · 03-26-2003, 11:35 AM

Just the constant ignition of the sulfur will turn most bulbs after a while.

LJ · 03-26-2003, 09:14 PM

Thanks All!!

TikiTanningChris · 03-27-2003, 02:12 AM

Quote:
On 2003-03-26 11:35, Tan Talker wrote:
Just the constant ignition of the sulfur will turn most bulbs after a while.

Not to say your wrong, but I had been told the element in low pressure bulbs that ignited was actually mercury not sulfur, just to clarify?

Tan Talker · 03-27-2003, 06:30 AM

Sorry Tiki, you are correct, The central element in a fluorescent lamp is a sealed glass tube. The tube contains a small bit of mercury and an inert gas, typically argon, kept under very low pressure. The tube also contains a phosphor powder, coated along the inside of the glass. This is what I was talking about, phosphor not necessarily sulphur that turns black after so many ignitions. The mercury does the ignition and after time the phosphorous coating blackens.

JOHN @ URI · 03-27-2003, 10:07 AM

The blackening on the ends of the lamps is caused by the emmissions material being scattered off of the filament by the strike of the starter.

You can avoid black ends by switching to an Electronic starter by Cosmedico or Aegis.
An electronic starter evenly pre-heats the whole filament, to get an instant on, it is not a hard strike like that of a standard glow-bottle starter.

Mercury has nothing to do with end blackening.

For more info on end blackening go to www.cosmedico.com & look at thier white papers on end blackening.

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03-25-2003, 08:29 PM	#1 (permalink)
LJ Join Date: Jan 12 2003 Posts: 192 Rep Power: 6	Hi, I bought at my Heartland beds in feb. All my bulbs are new. I have noticed that most all the bulbs have a little blackening at the end. my receptionist noticed and asked me if it was time to put new bulb in... HAHA... not with less than 100 hrs on each bulb...lol... cosmolux.. Anyway... I suppose this is normal because it is on all the bulbs... I will call Heartland tomorrow if you all tell me it is NOT right... thanks!

03-25-2003, 09:22 PM	#2 (permalink)
BooBop I love Derf!! Join Date: Apr 5 2001 Posts: 9,496 Rep Power: 13	This is normal. Usually happens with the first few light ups.

03-26-2003, 10:54 AM	#3 (permalink)
Roger a. Brown Join Date: Aug 8 2001 Posts: 61 Rep Power: 0	LJ: Check your voltage across both hot lead. I do not know what the requirements are for those units. It appears that it is either high or low causing "flashing in the filiments. If I may assist, please contact me. Roger A. Brown puretan Intl. 800-338-8267 X201/rogerb@puretan.net

03-26-2003, 11:10 AM	#4 (permalink)
lampman Join Date: May 27 2001 Posts: 204 Rep Power: 8	What starter is being used?There were some beds put out with K-11 or S-11.These starters are known to cause problems.

03-26-2003, 11:35 AM	#5 (permalink)
Tan Talker Join Date: Jan 18 2002 Location: Lake Mary, Florida Posts: 1,020 Rep Power: 7	Just the constant ignition of the sulfur will turn most bulbs after a while.

03-26-2003, 09:14 PM	#6 (permalink)
LJ Join Date: Jan 12 2003 Posts: 192 Rep Power: 6	Thanks All!!

03-27-2003, 02:12 AM	#7 (permalink)
TikiTanningChris Join Date: Mar 9 2003 Posts: 10 Rep Power: 0	Quote: On 2003-03-26 11:35, Tan Talker wrote: Just the constant ignition of the sulfur will turn most bulbs after a while. Not to say your wrong, but I had been told the element in low pressure bulbs that ignited was actually mercury not sulfur, just to clarify?

03-27-2003, 06:30 AM	#8 (permalink)
Tan Talker Join Date: Jan 18 2002 Location: Lake Mary, Florida Posts: 1,020 Rep Power: 7	Sorry Tiki, you are correct, The central element in a fluorescent lamp is a sealed glass tube. The tube contains a small bit of mercury and an inert gas, typically argon, kept under very low pressure. The tube also contains a phosphor powder, coated along the inside of the glass. This is what I was talking about, phosphor not necessarily sulphur that turns black after so many ignitions. The mercury does the ignition and after time the phosphorous coating blackens.

03-27-2003, 10:07 AM	#9 (permalink)
JOHN @ URI I love Derf!! Join Date: Dec 21 2001 Location: Cleveland, Ohio Posts: 1,299 Rep Power: 7	The blackening on the ends of the lamps is caused by the emmissions material being scattered off of the filament by the strike of the starter. You can avoid black ends by switching to an Electronic starter by Cosmedico or Aegis. An electronic starter evenly pre-heats the whole filament, to get an instant on, it is not a hard strike like that of a standard glow-bottle starter. Mercury has nothing to do with end blackening. For more info on end blackening go to www.cosmedico.com & look at thier white papers on end blackening.

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