Match night in the compound: the projector or the big TV, decided by sun, wall and watts

The compound cinema dream is arithmetic in three variables: how much light the scene has, how far the image must stretch, and how much of the sky's weather the machine has to survive. A projector buys diagonal inches no television price approaches; a big TV buys reliability no projector matches at dusk. The decision is almost never about resolution - and it starts with the one number the listings hide.

Brightness: the unit that settles the argument

Projector light output is honestly measured in ANSI lumens - a standardised grid of readings, published by the serious makers on their spec pages. The numbers that dominate cheap listings ('40,000 lumens', lux figures, 'bright as daylight') are not the standard, and the gap is not rounding: lux measures light at one spot at one distance, and a marketing department can raise it by moving the tape measure. The desk's single test: no ANSI number on the page means the page is the answer. And the physics that owns the whole purchase: ambient light swamps projection - a machine fine after sunset washes out at noon, where the television's own brightness fights the sun and wins. Outdoor match viewing is therefore an evening sport for a projector, and a daytime one for the TV, full stop; the reviews that 'discovered' otherwise were shot at dusk.

The geometry before the bracket

Image width comes from distance times the lens's ratio - a figure the spec page states, zoom range included - so measure the wall and the seating before deciding anything, and place the machine by the maths, not the armchair. Physical placement beats digital correction every time: keystone is the projector resampling its own picture to fake a square, and on text-heavy content - the scorebug, the subtitles, the church lyrics - the smear is the price. And a household truth no catalog mentions: the projector fan is an air conditioner for its own optics, and outdoors that air is harmattan - the filter access on the maker's page is not a spec, it is your maintenance calendar.

The outdoor tax, itemised

• Wind: a sheet is a sail, and a rippling screen makes a 120-inch image look hand-painted by a drunk; a tensioned frame, a wall, or the actual screen - the only three honest answers.
• Sound: the built-in speaker of any projector is a laptop's opinion about filling a compound; the page's number is the amplifier and speakers you did not budget, and the distance maths say the small PA class, not a shelf speaker pointed at the sky.
• Life: lamps dim on a clock and dust chokes the intake; LED engines dim slower and the spec page's lifetime figure is where the honest version of 'it lasts forever' lives. A TV behind glass outdoors is stealing the show from both.
• Power: both need the blackout answer - the TV sips label watts the inverter page can size, while a lamp projector's draw plus fans plus sound is a real load, and neither survives a surge any more gently than the router: the surge strip is not optional kit.

The verdict, as a rule

Fixed wall, evening audience, control over the light, a real sound plan: an ANSI-rated 1080p-class projector is the biggest picture per any amount of money and the desk endorses the dream. Daylight viewing, kids' cartoons on demand, wind, zero budget for speakers, or a household that will not touch a filter: the largest screen that mounts to that wall, and the dream defers a season. The one losing play is bought the same day both are priced - the no-name projector whose spec page flinches at the word ANSI.