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GE Optimiser Lite White lit up!

GE Optimiser Lite White lit up!

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At ricksbulbs' advice, I lit this up on a low power single lamp preheat ballast. Works, though this particular specimen struggled to start. The second Optimiser lit with no issues.

image~145.jpeg image~144.jpeg image~143.jpeg image~142.jpeg

Light Information

Light Information

Manufacturer:GE
Model Reference:FM28LW
Lamp
Lamp Type:FL
Base:G13
Shape/Finish:T12
Service Life:20,000 horas
Electrical
Wattage:28w
Voltage:?
Current:?
Optical
Lumen Output:2500
Color Temperature:4100K
Color Rendering Index:49
Physical/Production
Dimensions:48 inches nominal
Factory Location:Bucyrus Ohio
Fabrication Date:1985

File information

File information

Download: Download this File
Filename:image~143.jpeg
Album name:silverliner / Fluorescent - T-12 and larger
Keywords:Lamps
File Size:303 KB
Date added:May 22, 2016
Dimensions:2465 x 1848 pixels
Displayed:173 times
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-120713
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veryhighonoutput
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T12


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May 22, 2016 at 04:13 PM Author: veryhighonoutput
Imagine a lamp so technical as this one but purely great

T12/ t17 there's a reason they made heavy magnetic ballasts

rjluna2
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Robert


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May 22, 2016 at 05:27 PM Author: rjluna2
Which preheat ballast did you used, Dave?

Pretty, please no more Chinese failure.

jercar954
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May 22, 2016 at 07:42 PM Author: jercar954
What does the "M" mean? Lite white reminds me of a brighter vegetable green.

Preheat and T-12 fluorescents forever! Down with LED's and instant start T-8 fluorescents.

Silverliner
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Verd a ray classic.


GoL
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May 22, 2016 at 07:42 PM Author: Silverliner
A GE low power 30/40w single lamp preheat ballast.

May all the great lighting technologies have their place in history.

Administrator of Lighting-Gallery.net. Need help? PM me.

Silverliner
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Verd a ray classic.


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May 22, 2016 at 07:49 PM Author: Silverliner
Oh, I don't know what M means.

May all the great lighting technologies have their place in history.

Administrator of Lighting-Gallery.net. Need help? PM me.

ricksbulbs
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May 22, 2016 at 11:11 PM Author: ricksbulbs
the M means the lamp is an Optimiser. It was used to allow instant recognition if the lamp etch was visible from the floor so you would use the FM 28 lamps. Later ones didn't have the M. Some also had black etches later on. Told'ja so on running on a preheat ballast! Something tells me any 40 watt preheat ballast including Tulamp and HPF single will run these without protest, and probably at more like 35-40 watts. The 25 watt home shop light tubes were actually lower wattage than the FM 28 lamps, and will run on PH and work like regular F 40 in my observations. I have used up a bunch of these lamps in PH fixtures and they typically have HALF or less the life of regular F40. Funny, as the FM 28 lamps seem to last forever on a PH ballast. Makes you wonder, especially since GE did shady things for many years, they are the Greedy Extortionists after all! Yeah, Lite White is an odd bird, when used with cool white, it looks similar but not the same. The color rendering is AWFUL. I have ni idea why they even used this crappy phosphor and sold it, Dave, any ideas? Maybe it was a bit more efficient? Anyway, there ya all go----my experience with FM 28 on preheat ballasts confirmed. Rick D.
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May 22, 2016 at 11:12 PM Author: don93s
Probably 'Miser' with a big 'M', lol! since these are only 28w instead of 34w. Wonder what the lamp voltage is on these?
ace100w120v
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May 22, 2016 at 11:35 PM Author: ace100w120v
Lite White is 49CRI, 3900K. With halophosphate lamps the lower the CRI the higher the LPW, hence why deluxe lamps like /950 or /CWX are dim. Lite White 34w 4', 60w 8' etc. lamps were supposed to be as bright as their cool white full-wattage counterparts.

So do these "M" lamps have krypton if they run at reduced wattage on a full power PH ballast?
Silverliner
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Verd a ray classic.


GoL
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May 23, 2016 at 12:21 AM Author: Silverliner
I didn't see any striations from this when I lit it up, and it was a bit cold and starved.

May all the great lighting technologies have their place in history.

Administrator of Lighting-Gallery.net. Need help? PM me.

veryhighonoutput
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T12


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May 23, 2016 at 03:06 AM Author: veryhighonoutput
I'd like to see how it starts?

T12/ t17 there's a reason they made heavy magnetic ballasts

Powergroove
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May 23, 2016 at 05:47 AM Author: Powergroove
I never knew these things existed. I dont fremember seeing these used anywhere. Great rare lamp you have.

Keep government out of the lighting industry.

rjluna2
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Robert


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May 23, 2016 at 10:03 AM Author: rjluna2
Thanks, Dave

Pretty, please no more Chinese failure.

don93s
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Jun 01, 2016 at 06:06 PM Author: don93s
I think I found a ballast on ebay for this.
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