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Philips O-Tube

Philips O-Tube


Took a picture of my old Philips Lamp with O-Tube.
Can anyone see, when this one was produced??

DSC01553.JPG DSC01360.JPG DSC06985.JPG

Light Information

Light Information

Manufacturer:Philips
Electrical
Wattage:40
Optical
Color Temperature:27 Warmwhite De Luxe
Physical/Production
Fabrication Date:??

File information

File information

Download: Download this File
Filename:DSC01360.JPG
Album name:duluxs / Tubes
Keywords:Lamps
File Size:122 KB
Date added:Aug 25, 2010
Dimensions:640 x 480 pixels
Displayed:1693 times
Date Time:2010:08:25 19:51:18
DateTime Original:2010:08:25 19:51:18
Exposure Bias:0 EV
Exposure Time:1/25 sec
FNumber:f 2.8
Flash:No Flash
Focal length:6.3 mm
ISO:320
Make:SONY
Model:DSC-W30
White Balance:0
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-47023
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magslight
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Aug 25, 2010 at 02:08 PM Author: magslight
The code is 5E, I'm right?
btw it does still works??
monkeyface
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Wolfram Verdampfungsgefässe


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Aug 25, 2010 at 02:24 PM Author: monkeyface
You got a nice rare circline here. It's made in Mai 1975.
duluxs
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Aug 26, 2010 at 10:00 AM Author: duluxs
Thanks a lot, not that old, but already quite rare

Yes it still works, but I bought a new one for this fixture in order to save this old one

Here is the type label of the lamp istself, maybe anyone can tell, when it was produced? Should be quite older than 1975...:

http://www.lighting-gallery.net/gallery/displayimage.php?pos=-47045
Rob
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Aug 26, 2010 at 10:48 AM Author: Rob
It is a very nice color. I wonder which color is now 'color 27' ? Like color 33 is now color 640.
James
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Aug 28, 2010 at 02:35 AM Author: James
Philips' Colour 27 has been obsolete for a very long time, so it did not ever receive one of the modern three-digit colour codes (although if it did, it would be called 927). /27 is an old Deluxe Halophosphor coating, which was made obsolete virtually overnight when the Triphosphor colours were introduced in the early 1980s. These old Deluxe colours of Philips are a combination of the usual calcium halophosphate coating plus a little magnesium fluoro-arsenate which boosts emission at the red end of the spectrum. /27 is a 2650K lamp with an extremely high colour rendering index of 94. This might sound good, but its efficacy is about 40% less than a standard halophosphor colour.

The modern triphosphors offer similarly high colour rendering index but without this efficacy loss. So for obvious reasons the old Halophosphor Deluxe series disappeared quite swiftly during the early 1980s. I've made an overview of the old colours and their modern equivalents at http://www.lamptech.co.uk/Documents/FL%20Colours.htm
Rob
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Aug 28, 2010 at 05:26 AM Author: Rob
Thanks James! good information
TL8W
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Lee


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Jan 15, 2017 at 04:43 AM Author: TL8W
Yes all the Philips lamp colours ending in a 7 were high fidelity Halophosphates. Colours 37 (940) and 47 (950) were specified for colour critical applications.

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