Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: Is it bright enough to use in a classroom? (in the past 3000 lumens was the gold standard.. 700 hardly seems bright enough)
Document: This LG projector packs in a ton of features into a small package. I cut pay cable out years ago, so I love the digital tuner and the smart tv features where you can stream Amazon, Netflix, Youtube and others. I use the projector in a room with no windows so it is plenty bright. My only complaint is that there is no zoom feature, so the further back you place the projector the larger the image.
The PB63U is about half the size of this already compact projector and produced only an average image. Save yourself the hassle of a return and snag the PA77U.Pros:700 Lumens produces plenty of light for an LED projectorThe smart apps work really wellBeautiful image qualityPortable and includes a nice carrying caseIncludes 2 remotesQuiet fans and no light bleed means you can place the projector anywhere30,000 hour lamp lifeCons:The smart remote is pretty cool but it is more hassle than it's worth.
Works well even in bright light. Heats up a bit but no problem with performance of the projector . Apps are not that robust
High-end quality, it offers what promises. It has a brilliant bright. Small size, It comes with a custom baggage. Recommended!
It asks questions that I can't answer. Not user friendly and not intuitive.Any suggestions out there for a projector that allows you to use iPhoto, focus and enlarge images ? ?
Never heard another word. So I ferreted through the Ap store or I should say I called my computer geek and he found the Share ap. several hour later. It did download my photos but they are not recognizable. You must open each one to see what it is. To solve that problem I decided to download the few I want to use on a thumb drive. But you can see now, this is quite time consuming.
Absolutely love this projector as a do it all device. I wanted a projector that was portable enough that I could setup outdoor movies, take it to friends houses, or watch at home and this is perfect! Runs quietly, produces a beautiful image, while also offering a number of smart apps with built in WIFI. I wanted an affordable LED projector (paid $629) that performs like an expensive one, and this is it. You just can't beat these features and image quality for the price range.
My main need is projecting images for painting and this got good reviews This machine has multiple functions, mainly  games and  movies. Getting to your photos is the least functional feature. Don't think you can plug this into your computer and click iPhoto and have the image on the wall.The process is very complicated for the technologically challenged. First, even finding out how to set it up is a well guarded secret.
I'm overall very impressed with this projector.
Great projector
Answer: It all depends of how much dark you can get your classroom and how big your screen would beSo, you can buy it and adjust the size of your screen accordingly to the brightness in roomSome hints: First -This is one of the brightest led projectors yet (even LG PF85U with 1000 lumens is somehow not so more strong, because image seem those they boost with a wite lamp to get more lumens, like acer k530)Second: Led lamps do not get weak over the time like regular ones do, and the light is somehow much less yellow tinted, so one 700 lumens led projector, can be compared with a much brighter regular lamp projector, like a old 2000 lumens lamp oneThird: If you want a brighter and much more powerfull projector, that lasts more than 20.000 hrs, specially to use in classrooms, go to the casio signature models, with 2500 to 3000 lumens (white light also). Those casios have not so great color balance, costs like U$ 830 to U$1000, but are the perfect choice for educational issues, and are really realy strong (there is a youtube presentation were a guy uses it's internal laser source to cut appart some plastic garbage, to show how strong is its light source - of course, when iside the projector, its laser is safe and does not hurt anyone - but dont stay staring directly to the light at short distances, as you wouldnt do also on a 3000 lumens lamp projector...)