The NEC NP-L102W is truly a portable system, but a serious one. This isn't one of those 20, 50 or 100 lumen pico projectors, that struggle with a 40 inch screen in a fairly dark room. Nor is it one of the many pocket projectors claiming 500 lumens or less (and usually delivering even less), which are a lot brighter, but still demand better lighting control or smaller screens.
On the other hand, the L102W isn't near as powerful as some other projectors one could buy for a price similar to the L102's street price of just under $800. Lamp based projectors in this price range, will be 2.5 to 3.5 times as bright.
This NEC NP-L102W, however, is a great compromise. If you don't need to do larger room presentations (say projecting on screens 8 feet or larger), this portable should do a nice job in most environments. Essentially this LED projector can handle a good bit of ambient light on screen sizes from 60 inches 80 inches and go larger if there's better lighting control.
That folks is all most road warriors need. They will not be embarrassed by the lack of brightness. And the good color and reasonably sharp picture for a WXGA projector will equally impress audiences.
Want to use the NP-L102W as a portable education projector, say for moving from classroom to classroom, or perhaps given to a specialist that goes from school to school? It's got enough brights and capabilities for that too. In that regard, 1000 lumen projectors were as bright or brighter than most projectors installed in schools up until perhaps 6-8 years ago. Many schools still have mounted 800, 1000, and 1200 lumen projectors in their classrooms.
Use this projector to present to 4 people or 20. In the right room, with good lighting control, a 50+ person seminar is very doable.
Please remember, until a decade ago, 2000 lumen projectors were what most corporations used in hotel ballrooms on 20 or 25 foot screens, and they did a great job, but the rooms needed to be very dark for those huge screens.
WXGA resolution is a great resolution for normal presenting. Higher resolution is always better, producing a crisper image, but as I pointed out earlier in this review, this NEC will project small text (10 point) sharp enough to be easily read, if people are close enough, but it's 18 to 60 point type that's normally used in Powerpoint presentations.