RE: projector bulbs

["Phil Harris" <phillip.harris1@xxxxxxx>]

*chuckle* I hadn't realised that CFL was the backlighting on LCD displays
....

.... no way in hell would that be bright enough!

Phil

> -----Original Message-----
> From: Keith Doxey [mailto:ukha@xxxxxxx]
> Sent: 28 October 2001 09:57
> To: ukha_d@xxxxxxx
> Subject: RE: [ukha_d] projector bulbs
>
>
> Most of the LCD and DLP projectors I have come across DONT use Halogen
> lamps. Halogen lamps have a filament and give an intense source of
light.
>
> Most Non-CRT projectors use some form of Metal Halide or Xenon Arc
lamp
> which give an incredibly intense light source in a small bulb. To
achive
> that light level from a flourecscent light source would require a
> huge light
> source. These lamps are typically FROM £200 upwards :-(
>
> I have used a variety of LCD/DLP projectors and have yet to find one
where
> the lamplife achieved is anywhere near the makers claim.
>
> CFL is used for BACKLIGHTING because the size of the CFL lamp,
although
> quite large, is still smaller than the 14" LCD in front of it. In
a
> projector the LCD/DLP tablets are often less than 3" in size.
>
> It also takes less light for direct viewing of an LCD than it does for
any
> form of projection.
>
> If you want this for Home Theatre, save up for a bit longer and buy a
good
> secondhand CRT. Higher upfront cost but then no expendature on parts
for
> >10000 hours. I look after some that have just completed their 12th
summer
> season in a local pub where that are on for 12 hours per day April to
> October. They are still on the original tubes! By comparison an LCD
(the
> best have a quoted lamplife of 2000 hours) would need a new lamp every
166
> days at least.
>
> Just my £0.02
>
> Keith
>
> > -----Original Message-----
> > From: Rehan Khwaja [mailto:rehankhwaja@xxxxxxx]
> > Sent: 28 October 2001 02:17
> > To: ukha_d@xxxxxxx
> > Subject: [ukha_d] projector bulbs
> >
> >
> > I've been reading about projectors recently - they may be inside
my
> > price range finally - you can get them on ebay for ~$500.
> >
> > I was wondering if anyone knew why they only use halogen lamps,
which
> > are so inefficient in terms of power and have such a short life. 
I
> > would have thought that CFLs offer better value for money.  Has
> > anyone tried to retrofit a CFL into an LCD or DLP projector?
> >
> >
> > For more information: http://www.automatedhome.co.uk
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>
>
> For more information: http://www.automatedhome.co.uk
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