TVs & Home Theaters forum

General discussion

Panasonic Lifi bulbs (DLP)

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.)

Discussion is locked
You are posting a reply to: Panasonic Lifi bulbs (DLP)
The posting of advertisements, profanity, or personal attacks is prohibited. Please refer to our CNET Forums policies for details. All submitted content is subject to our Terms of Use.
Track this discussion and email me when there are updates

If you're asking for technical help, please be sure to include all your system info, including operating system, model number, and any other specifics related to the problem. Also please exercise your best judgment when posting in the forums--revealing personal information such as your e-mail address, telephone number, and address is not recommended.

You are reporting the following post: Panasonic Lifi bulbs (DLP)
This post has been flagged and will be reviewed by our staff. Thank you for helping us maintain CNET's great community.
Sorry, there was a problem flagging this post. Please try again now or at a later time.
If you believe this post is offensive or violates the CNET Forums' Usage policies, you can report it below (this will not automatically remove the post). Once reported, our moderators will be notified and the post will be reviewed.
Collapse -
Panasonic LiFi PT-56LCZ70 Lamp Warranty - 5 Years

In reply to: Panasonic Lifi bulbs (DLP)

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 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 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.

Collapse -

In reply to: Panasonic LiFi PT-56LCZ70 Lamp Warranty - 5 Years

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!

Popular Forums

Computer Newbies 10,686 discussions
Computer Help 54,365 discussions
Laptops 21,181 discussions
Networking & Wireless 16,313 discussions
Phones 17,137 discussions
Security 31,287 discussions
TVs & Home Theaters 22,101 discussions
Windows 7 8,164 discussions
Windows 10 2,657 discussions


This one tip will help you sleep better tonight

A few seconds are all you need to get a better night's rest.