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Cold Cathode Fluorescent Lamp

10-26-2007, 05:37 PM
I'm looking at buying the Samsung 32" LNT3242H model. The only thing I'm concerned with is it has the type of lamp listed above. Does anyone here know much about these lamps? How long before they burn out, do they burn hot, etc. ?


10-26-2007, 08:11 PM
haha wow im accually looking at the same model to buy how much are you gettting yours for?? and also I want to hear the answer to your ?

10-26-2007, 08:25 PM
Just about all LCDs use CCF lamps for backlighting.
The half life (time until the lamp reduces to 50% of original light output) varies from 60,000 to 100,000 + hours.
So if you watch TV 5 hours a day, you may notice that you have to turn the contrast up after 10 or 15 years.

10-26-2007, 08:42 PM
These are the same lamps used in laptop LCD displays and are essentially the same as any fluorescent lamp, although they use high-voltage, rather than heating the cathode, to release electrons needed to excite the tube and make it glow (hence the term "cold cathode").

Generally they are reliable and last a long time, although often the inverter circuits used to generate the high voltage fail prematurely due to stress.

The biggest problem is, as you probably have noticed with most fluorescent lights, the color of the light is "cool". This has a direct affect on the quality of color produced by an LCD display as the backlight is the only source of light and the LCD panel simply filters or tints the white light produced by the backlight.

Lately, a number of LCD's with broad-spectrum backlights have come to market. These LCD's produce much more accurate colors than was possible before.