Manufacturer: Osram
Model: Dulux S G23 9W/67 Blue
Application: General Lighting - decorative
Wattage: 9W
Width (max): 32mm
Length: 165mm
Tube Length: 240mm
Bulb/Tube material: Glass, colour 67 phosphor on inner surface
Colour Temperature: Blue
Peak output wavelength: Not Known
Total light output: 200Lm (Manufacturer's claim - 22.2Lm/W)
Rated lifetime: Unknown Hours
Cap: G23
Operating voltage: 60V AC Only
Operating current: 170mA
Warmup/restrike time: 1 minute/none
Cost (original): Unknown
Value (now): Compatible lamps available from BLT Direct for 7.14 (August 2010).
Place of manufacture: Italy
Date of manufacture: Unknown
Lamp Status: Working, new in packaging.
Related Pages: Osram Dulux S 9W Red
Notes: Compact fluorescent lamps in non-standard colours are not quite as unusual as they used to be, starting to obtain a bit of a foothold for either decorative lighting, or for use at occasions such as children's parties.  They generally however are adaptations of existing designs of integral compact fluorescent lamps - aimed squarely at the domestic market. 

There are however an increasing number of manufactuers starting to supply compact fluorescent lamps in colours which were previously considered "non standard" - but generally have been available in linear fluorescent form from specialist suppliers for a while.  These range from coated lamps required for vivid colours, and uncoated lamps with non-white phosphors for more pastel shades.

Osram have launched coloured versions of thier Dulux S lamps which are intended for new installations, making use of a separate, permanently fixed ballast assembly.  The G23 lamp cap contains a conventional glow-bottle starter and RFI supression capacitor within the square portion between the pins.  This is a sensible feature, as when fluorescent lamps fail, if they are not spotted quickly the starters tend to fail with the contacts welded shut, and the lamp effecitvely left in "pre-heat" mode permanantly - and really, you should be replacing the starter when you replace the tube anyway.  This arrangement ensures that with each new lamp a new starter is installed.

The precense of this starter and capacitor of course means that this particular lamp is only suitable for use on conventional magnetic ballasts.  A four pin version which lacks the starter and capacitor, hence is suitable for use on electronic ballasts does exist however, which is otherwise identical. 

As usual for Osram, the overall manufacturing quality is very good, and the lamp performs well.  Unlike the green and red versions of this lamp which are quite pale in colour, this blue one produces quite an intense, saturated "electric" blue light which is really quite eye-catching.  There is sufficient deep blue emission that it causes anything fluorescent in colour (as demonstrated by the orange handled screwdriver resting on my desk in one of the photographs below (this was deliberately placed there given its tendency to react to deep blue or longwave UV very well). 

While their unusual colours mean that these lamps are maybe not ideal as a first choice for general lighting, as an accent for a room they really can work very well.  My old room used to have either the blue or red version secluded behind the amplifier (which you can see on my desk in the image below) providing a gentle colour wash over the entire wall behind it (unfortunately the addition of the VCR and turntable to this stack means there's no space for it these days).  The effect was really quite striking, and I don't doubt that if these lamps were used for example in a hotel conference room or corridor, to simply provide a splash of colour rather than as the main lighting source, the effect would work just as well.

I would be curious to know if a yellow version of this lamp (or any other colour for that matter) exist or have ever existed to compliment the three colours I have here.  The main reason for this is that while red, green and blue lamps using a phosphor for the colouration are not unusual, I have only seen one clear lamp similar to this which I would have described as yellow, rather than very warm white.

Click Thumbnails for full size images.


This lamp added to the Virtual Display Shelf on the 2nd September 2010 at 21:16.

References: Lamp packaging, lamp markings and manufacturers datasheets.

Acknowledgements: Many thanks to the reader of this website who donated this lamp (and many others) for display!


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