Poll: How bright is your hall projector?

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AV and Multimedia Related Thread, LED Projector in Hall??????? in Technical; One of my schools wants to install a new AV solution in the school hall. We have all of our ...
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    LED Projector in Hall???????

    One of my schools wants to install a new AV solution in the school hall. We have all of our quotes in and one of the three companies has quoted for a Casio 2500 Lumens LED projector. The hall is a particularly bright one with high level windows all around. The other quotes have been for conventional 4000 lumens projectors.

    Is it just me or is 2500 lumens a bit lightweight?

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    CPLTD's Avatar
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    Hi Ba9ag,

    If you would like a comparison quote be sure to ping me over a quick email

    joe@c-p-ltd.com
    Last edited by Dos_Box; 14th June 2012 at 11:56 AM.

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    pscott's Avatar
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    Ask them to bring the projector in and show you it in place as you doubt the suitability of the quote

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    localzuk's Avatar
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    We have a hall which can hold about 300 kids, is fairly dark and a 3500 lumen projector only just works ok in there. 2500 will more than likely be far too weak.

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    Quote Originally Posted by localzuk View Post
    We have a hall which can hold about 300 kids, is fairly dark and a 3500 lumen projector only just works ok in there. 2500 will more than likely be far too weak.
    That's what I was thinking. I've contacted the company and they don't have a projector available to do a demo.

    Has anyone actually got one of these projectors? If so, what do you think of them?

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    We have the casio XJ-A140 2500 lumen projector in our hall.. you''ll need something brighter!!

    Its okay but can struggle a bit on bright days (I.E. today!!)

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    Can you turn off the lights at that end? Got any curtains or blinds?

    If not, sounds like you're going to run into problems. If the light falls onto the wall you are projecting it on, 4000 probably won't be enough

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    Quote Originally Posted by Busybub View Post
    Can you turn off the lights at that end? Got any curtains or blinds?

    If not, sounds like you're going to run into problems. If the light falls onto the wall you are projecting it on, 4000 probably won't be enough
    The light doesn't shine onto the projected wall and we do have curtains all around the hall but when we initially discussed this solution the Head expressed a desire to not have to go around closing all of the curtains every time we wanted to use it. I think it would be ok if we had to close only a couple of curtains but there are 26 curtains in the hall and it would be a bit of a mission to close and open them every time.

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    Quote Originally Posted by CPLTD View Post
    Hi Ba9ag,

    If you would like a comparison quote be sure to ping me over a quick email
    e-mail in the post
    Last edited by Dos_Box; 14th June 2012 at 03:33 PM.

  10. Thanks to ba9ag from:

    CPLTD (24th May 2010)

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    soveryapt's Avatar
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    Generally for "professional applications" (which as far as I'm concerned, hall usage comes under that) you want to be looking at 4000 Lumens + with a high contrast ratio to allow cleared differentiation between the dark and light colours on the screen too.

    Contrast ratio is something that a lot of people don't know about being an important part of choosing a projector.

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    Anyone else got an opinion on this?

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    We have a 4000 Lumens HP CP-X605 Projector in our hall. At a push we can get the whole school in the hall (1500 students). The projector does the job ok, but I wouldn't want to go any dimmer than that - I wouldn't say no to one of those new Casio Laser Projectors in there (it is a royal PITA to swap a buld out up there), but there's no chance of spending money of flash stuff like that at the moment!!

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    plexer's Avatar
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    3000 lumens NEC VT770 in ours works fine but on really bright days we can close the curtains too.

    Ben

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    What size is the screen you are going to be projecting onto? Did the companies who surveyed take any light readings with a light reader? If so do you have the results from this?

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    You are pushing it, you need around 200 lumens at the screen and you wont get it if your screen is bigger than about 75" with that projector, also they are not good for a hall as you usually mount higher than classrooms so you have to think of servicing it and changing lamps, you need a better class of projector altogether, min 3500 lumens at projector will give you around 200 lumens to a 105" screen, again many makes available but i have done far less repairs on Epson than any other make.
    Casio....hmmmm remeber their watches, most other makers are briging better soloutions out also LED if you want to go that route, but i would not recomend LED at this time, they actually have no benifit.

    Marc
    Projector Engineer

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