Brian Posted February 15, 2004 Posted February 15, 2004 I've just read a press release from these people ledtronics about a range of 3200K LEDs and LED lamps. For those who don't know, 3200K refers to the colour temperature of the light given off; 3200K is around the colour of a standard theatre lantern.
Stu Posted February 15, 2004 Posted February 15, 2004 So will be perfectly balanced for TV use then I presume? Stu
Ike Posted February 15, 2004 Posted February 15, 2004 What is the colour temperature of the ones sold as 'white' LEDs by maplin etc? I'm assuming its a fair bit higher.
Guest lightnix Posted February 15, 2004 Posted February 15, 2004 I can't find the article to which you refer, but AFAIK I don't think LEDs are rated at an actual colour temperature at the moment. In this data sheet, Lumileds refer to their Luxeon warm white emmiters as having a "nominal correlated" colour temperature of 3200°K, which I don't think is quite the same as an "actual" colour temperature of 3200°K. A bit like compact fluorescents. "White" LEDs are really blue ones, with the chip covered in a phosphor which emits in a shade of yellow. The yellow and blue light combine to approximate to white. Also, the construction of white LEDs means that most of them have a slightly bluish centre. The warm white effect has been achieved by adjusting the phosphor layer slightly. I think it will be a a little while before we see LEDs doing any kind of front lighting, although it will certainly be just a little while.
robloxley Posted February 15, 2004 Posted February 15, 2004 AFAIK, LEDs aren't monochromatic sources, but then aren't as wide-spectrum sources as tungsten-halogen lamps. Anyway, don't TV and films use a lot of discharge sources (as opposed to TH ones) anyway?
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