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The Na 10 FL spectral lamp at startup

The Na 10 FL spectral lamp at startup

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The ignitor is an OSRAM St 111 (4 thru 80w) fluorescent starter. It glows for 2 seconds until the Na10FL lights up. The spectrum of the Na10FL lamp at startup is that of mercury, thus the FL designation(?) (Need to record with my spectrograph to confirm if it's Hg). It quickly becomes overpowered by the sodium doublet..but the lamp remains feeble..the spectrum resembles the LPS spectrum but there is a faint continuum throughout which is bright at the violet-blue. That's the reason the lamp is enclosed inside a dichroic coated shield; the interference pattern created by the coating of the shield allows only the sodium doublet to pass.

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Light Information

Light Information

Manufacturer:Osram
Model Reference:Duka 10 Studio
Lamp
Lamp Type:Na 10 FL spectral lamp
Electrical
Wattage:10w (35w total fixture)
Voltage:120volts
Physical/Production
Dimensions:Lamp is about 8cm (2.7")

File information

File information

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Filename:3_IMG_4048.jpg
Album name:lights*plus / Darkroom Safelights
Keywords:Lamps
File Size:480 KB
Date added:Feb 10, 2015
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URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-104185
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Skiller
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Feb 10, 2015 at 05:38 AM Author: Skiller
I see. So it's actually more like a HPS lamp modified to output monochromatic light rather than a LPS lamp.
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