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Panasonic Lifi bulbs (DLP)

by Fewmets / December 27, 2007 3:00 PM PST

Do the heavily-touted Panasinic Lifi bulbs (found in their DLP sets) really live up the the promise that they weill never have to be changed (a $300 USD purchase)?

I am currently considering the 56" DLP Panasonic model and this is a major factor in whether I make the purchase or not (its other specs seem quite good, e.g. 3000:1 contrast ratio, 1080p, etc.)

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Panasonic LiFi PT-56LCZ70 Lamp Warranty - 5 Years
by whp03 / January 9, 2008 9:45 AM PST

The first of its kind Panasonic LiFi hybrid light source has a 5 Year warranty. For a RPTV light source - that's unheard of.

You probably already know the LiFi hybrid light source is quite different from traditional UHP lamps as they are electrodeless. Electrodes in traditional UHP lamps erode/evaporate over time significantly decreasing light output/brightness. Everytime a UHP light source is used you're essentially burning the candle down; eroding the electrodes, widening the gap, reducing light output and driving the lamp towards self-destruction. The inherent design of such bulbs yield an unavoidable short lamp life.

When manufacturers quote the "life" of a light source in hours (i.e. 3,000 hrs) it means the number of hours at which 50% of the bulbs in a "population" of bulbs will fail. From what I see, UHP bulbs are rated for 2000-5000 hrs (and cost approx $300 to replace). The Luxim.com website says the LiFi (4000) lasts up to 5X as long as traditional light sources, meaning they should last the life of the TV.

I recently read a blog coming out of Vegas/CES 2008 that discussed the current "deal" RPTVs represent to consumers, even in the face of declining prices on LCD and plasma displays. The Panasonic LiFi PT-56LCZ70 was specifically mentioned along with a sub $1000 retail price. I just looked on Amazon and they're selling the 61" 1080p for the same price as the 56" 1080p (under $1300). Dollar for dollar and inch for inch I don't think you can go wrong with the Panasonic LiFi TVs.

Check out the user comments on Amazon.com. The vast majority give the Panasonic LiFi HDTVs high ratings on price/value (putting money in their pocket over similarly sized LCD/plasma displays), brilliant stable color, nearly instant-on start times, and the prospect of never having to change the lamp.

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PANOSONIC PT-56LCZ70
by jerryrock / September 19, 2008 9:31 PM PDT

Hi
I have a 56" dlp from Panasonic with the lifi 4000 light source it showed at the store in texas,Ishiped it to trinidad and it's not starting.The power light just blinks,I checked the power supply to the lifi and it seems ok
110v going in and 25v to the lifi.Should i change the lifi?this tv is brand new!

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