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Vintage GE F15T8-BLB USA Blacklight

Vintage GE F15T8-BLB USA Blacklight

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Both the GE lamp & the unknown fixture (L&L mfg.) date from 1978. Took the spectrum near one of the electrodes (IR lines at upper right). The blue-violet-grey band to the left of the 404nm Hg line is all that is allowed. The 365nm UV line is almost entirely blocked.

IMG_2445_InductionLampSpectrum.jpg Globe-60wBlackLight.jpg GE-blacklight.jpg Neon-vs-fl-lamp.jpg

Light Information

Light Information

Manufacturer:General Electric
Model Reference:F15T8-BLB
Lamp
Lamp Type:Blacklight
Electrical
Wattage:15watt

File information

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Filename:GE-blacklight.jpg
Album name:lights*plus / Lamp Spectra
Keywords:Lamps
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Date added:Dec 29, 2015
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rjluna2
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Robert


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Dec 29, 2015 at 06:19 AM Author: rjluna2
So, indeed it is the Woods glass here. Thanks for sharing

Pretty, please no more Chinese failure.

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Mar 24, 2016 at 12:37 AM Author: Globe Collector
Interesting the 365nm line is blocked...normally Wood's Glass passes this line....do you have any ideas what is attenuating this line here, the lamp glass or the camera? I know Wood's passes IR, so the I.R. lines (I assume mercury lines) are not a surprise.

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

rjluna2
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Mar 24, 2016 at 06:32 AM Author: rjluna2
If I recalled correctly, I pulled up a broken BLB fluorescent bulbs from the dumpster about 20-25 years ago there was some kind of internal coating. Perhaps that coating could block certain transmission

Pretty, please no more Chinese failure.

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Mar 24, 2016 at 06:29 PM Author: Globe Collector
No, the "coating" you saw is one of those phosphors I mentioned in the post under Geroge's Wood's Glass CFLi "Next Door".
I have found these tubes, broken in a "dumpster" (we call it a "skip bin" here) also, and I have carefully recovered every broken piece I could find...I keep broken pieces of Wood's Glass and samples of phosphors...so I have them to study.
If I ever get the equipment to cast glass, I have the raw material for Wood's Glass bulbs.

Manufactured articles should be made to be used, not made to be sold!

Fee, Fye, Fow, Fum, A dead man's eye and a parrot's BUM!

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