LG CineBeam S: throw distance & specs
4K UHD · 500 lumens · throw ratio 0.25. For a 100″ screen it sits 1.8 ft away.
The LG CineBeam S sits 1.8 ft from a 100″ screen and about 2.2 ft from a 120″ screen, set by its official 0.25 throw ratio. At 500 lumens it pairs best with a CLR (Fresnel) ALR screen, even in a lit room.
Throw ratio
0.25
Brightness
500 lumens
Resolution
4K UHD
Type
UST
| Throw ratio | 0.25 |
| Brightness | 500 lumens |
| Resolution | 4K UHD |
| HDR | Yes |
| Light source | laser |
| Type | Ultra-short-throw (UST) |
| Price | ~$1,300 |
Throw-distance calculator
LG CineBeam S — distance for a 100″ screen
1.8 ft
Lens-to-screen distance. Zoom (if any) lets you fine-tune within the range.
Throw distance by screen size
How far the LG CineBeam S sits from the screen at common 16:9 sizes, across its full zoom range.
Every projector’s throw distance, by screen size: 100-inch screen · 120-inch screen
Which screen for the LG CineBeam S?
As an ultra-short-throw projector, the LG CineBeam S fires light up at a steep angle. Pair it with a CLR (Fresnel) ALR screen sized to your throw — a standard ALR or matte-white screen will hotspot and wash out. In a room with daylight, the CLR screen is what makes the picture watchable.
Frequently asked questions
Compare with
Guides for this projector
ALR vs CLR screens
The two are not grades of the same thing, they reject light arriving from different directions, and the right one is decided by where your projector sits. A **CLR** (ceiling-light-rejecting) screen has a horizontal sawtooth structure that only works with light coming from below — that is, from an ultra-short-throw projector on a cabinet. An **ALR** screen rejects light arriving off-axis and suits a short-throw or standard projector further back. Put a UST projector on an ALR screen and you get a washed-out hotspot. Of the 110 projectors we track, 29 are ultra-short-throw (throw ratio below 0.4) and need CLR; the other 81 do not. And the number on the box will not help you tell the materials apart: across our 24 screens, CLR runs 0.5–1.0 gain and ALR runs 0.8–1.65, so 9 of them — 38% — sit in the 0.8–1.0 band where both types exist.
GuidesProjector screen gain explained
Gain is how much light a screen reflects back compared with a reference matte-white surface, which is defined as 1.0. A 1.5-gain screen sends about 50% more light toward the centre seat; a 0.6-gain screen sends 40% less. The counterintuitive part: **most ambient-light-rejecting screens have gain below 1.0**. Across the 24 ALR and CLR screens we track, 15 of them — 63% — are darker than plain white. CLR screens for ultra-short-throw projectors sit around 0.6. They buy contrast by rejecting light from the sides and ceiling, and they pay for it in brightness, so they need a brighter projector, not a dimmer one.
GuidesHow many lumens do I need?
Lumens needed scale with screen area and ambient light. As a rule of thumb, a 100-inch screen needs about 600 lumens in a fully dark room, around 1,300 for a living room with some light, and 2,700+ for a bright room. Bigger screens and more light need proportionally more.
Not sure it fits? Run your exact screen size through the calculator.
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