Manufacturer: Osram
Model: Active 60W Day White
Application: General Lighting - Daylight simulation
Wattage: 60W (62W Measured)
Diameter (max): 60mm (DC60 lamp shape)
Length: 100mm
Tube Length: --
Bulb/Tube material: Glass.  Day White Micro-particle inner coating.
Colour Temperature: "Day White" - precise temperature not stated
Peak output wavelength: N/A - Broadband emission
Total light output: 700Lm (11.67Lm/W)
Rated lifetime: Not stated
Cap: B22
Operating voltage: 230V AC
Operating current: 260mA
Warmup/restrike time: None
Cost (original): 1.69 in Sainsbury's Supermaket (Milton Keynes Central Branch)
Value (now): --
Place of manufacture: France
Date of manufacture: Unknown - Code h588 present on lamp crown.
Current Status: Working
Related Pages: Osram Relax 60W

It appears that Osram here is up to something a bit interesting here, selling "light" rather than lamps.  The "Active" and "Relax" lamps are part of a range of colour temperature corrected lamps available in a variety of styles.  The Relax lamp is a lamp with improved red/yellow output (actually - it's the blue output that's attenuated).  This means that it's a very warm light, ideal for use in places like dining rooms or lounge areas where an relaxed mood is desirable.  The Active lamp on the other hand has an attenuated red output, producing a more neutral white light, idea for working areas like utility rooms, garages, or for use in desk lights.

Basically speaking, this is simply a slightly more modern version of the old "Cool white" coloured lamps which you used to be able to find anywhere and everywhere.  Only real difference here, is that Osram have come up with a new type of powder coating which appears to have a more tightly controlled grain structure, and a consequently higher transmission efficiency.  I don't believe it's a huge difference, but as with any incandescent lighting, any efficiency gain is something to be grabbed by the scruff of the neck and put into use!

This particular lamp seems to behave somewhat differently to my expectations.  The degree of colour correction is far less than you'd generally expect from a daylight lamp.  This is quite evident when you look at the output figures - a 100W daylight lamp elsewhere on this site made from neodymium glass manages to give out just 500Lm, whereas this 60W lamp is giving out 700Lm...200Lm more, and 40W less power usage.  The reason behind this is quite simple; that this lamp has a far less heavily attenuated red output than a conventional daylight lamp - resulting in quite a lot warmer light too.  Looking at the light through a spectroscope reveals that there is a thin band of attenuation running from the yellow to mid-orange part of the spectra, and I imagine some further in the deep red, but that's not so visible.  Rather than the distinctly cool light from a "proper" daylight lamp, the output from this is very neutral, as the photos below show.

I cannot actually discern any logical reason for the use of the unusual lamp shape (The DC shape) which Osram chose to use for the Active and Relax lamps.  The main one I can see is that it will make it stand out more on the shelves (worked on me!).  It's nice to see a bit of variety.

Just the unusual shape makes this a nice one to have in the collection though.


Click Thumbnails for full size images.



Lamp added to the Virtual Display Shelf on Monday 23rd August 2006 at 21:56.

References: Manufacturers Datasheet.


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