Main trade-off
LG CineBeam S
External projector power is needed from the start.
Head-to-head
LG CineBeam S vs Optoma Photon Go: Optoma runs on battery, its 1.5-hour claim limits films
The short answer
Choose CineBeam S for a small 40 to 59-inch setup, 4K display or a compatible laptop's USB-C video connection. Choose Photon Go for its built-in battery and 60 to 100-inch portable setup. Plan external power for a long movie because Optoma's advertised battery time is only 1.5 hours. Both still need careful ultra-short-throw placement and controlled light.
Before you choose
The reasoning and the trade-offs
A USB-C socket can mean a different cable bag
LG lists USB-C display input, so a laptop with compatible USB-C video output can use a direct video cable. Photon Go's USB-C connection is for power only, so that same laptop needs an appropriate HDMI output or adapter for video.
What this is based on
LG specifies USB-C display and 20V/3.25A power input. Optoma explicitly labels USB-C as power input only. Host video support and cable capability are separate requirements.
Main trade-off
Optoma Photon Go
Its built-in battery is not rated for a full two-hour film.
LG CineBeam S
- Choose it for
- Use a 40 to 59-inch image or a 4K source display
- Connect compatible USB-C laptop video directly
- Main trade-off
- External projector power is needed from the start.
Optoma Photon Go
- Choose it for
- Start a short viewing session using the built-in battery
- Use a 60 to 100-inch Google TV setup
- Main trade-off
- Its built-in battery is not rated for a full two-hour film.
About this comparison
Compare CineBeam S and Photon Go for a small wall, laptop video, native resolution and a movie night away from a wall outlet.
Choose CineBeam S for a small 40 to 59-inch setup, 4K display or a compatible laptop's USB-C video connection. Choose Photon Go for its built-in battery and 60 to 100-inch portable setup. Plan external power for a long movie because Optoma's advertised battery time is only 1.5 hours. Both still need careful ultra-short-throw placement and controlled light.
Winner by situation
Start with what you need it to do
Plan a 50-inch image
Only LG includes that image size in its specified range.
- LG CineBeam S
- Better fit
- Optoma Photon Go
- Not suitable
Send video directly from a compatible USB-C laptop
Photon Go's USB-C is power-only. It needs HDMI for wired video.
- LG CineBeam S
- Better fit
- Optoma Photon Go
- Not suitable
Start a short session without external power
Photon Go has a built-in battery.
- LG CineBeam S
- Not suitable
- Optoma Photon Go
- Better fit
Finish a two-hour movie using only the internal battery
LG has none and Photon Go advertises only 1.5 hours.
- LG CineBeam S
- Not suitable
- Optoma Photon Go
- Not suitable
What matters in practice
The differences that matter
A USB-C socket can mean a different cable bag
LG lists USB-C display input, so a laptop with compatible USB-C video output can use a direct video cable. Photon Go's USB-C connection is for power only, so that same laptop needs an appropriate HDMI output or adapter for video.
How we reached this conclusion
LG specifies USB-C display and 20V/3.25A power input. Optoma explicitly labels USB-C as power input only. Host video support and cable capability are separate requirements.
A two-hour movie exceeds the internal-battery brief
Photon Go's stated 1.5-hour battery time is shorter than a two-hour film even before allowing for setup or pauses. Choose it for shorter unplugged sessions, or budget a compatible 100W PD 3.0 external supply for longer viewing.
How we reached this conclusion
Two hours exceeds the advertised 1.5-hour maximum by 30 minutes. Actual battery duration depends on settings and content, so this is a planning limit rather than a runtime test.
A 50-inch wall rules out one of the stated ranges
CineBeam S specifies 40 to 100 inches. Photon Go starts at 60 inches.
How we reached this conclusion
The conclusion uses manufacturer image-size ranges. UST installation offsets are not interchangeable with ordinary lens-to-screen measurements.
Try your real numbers
Will either projector fit your room?
The result checks hard limits only. Preferences stay out of the calculation.
LG CineBeam S
Does not fit these inputsFor a 120-inch 16:9 picture, the calculated lens position is about 2.18 ft. Your input is 9.50 ft. This model's documented picture-size range is 40 to 100 inches.
Optoma Photon Go
Does not fit these inputsFor a 120-inch 16:9 picture, the calculated lens position is about 1.57 ft. Your input is 9.50 ft. This model's documented picture-size range is 60 to 100 inches. Optical estimate only: this fixed 0.18 UST lens has no optical zoom. Lens-to-screen distance is not the gap behind the cabinet. Check the installation diagram for cabinet position, screen height and ventilation. Digital correction adds no optical range.
Distance is measured from the lens to the screen. The calculation uses a 16:9 image and the verified optical throw range for each exact model.
For an ultra-short-throw model, the gap behind the cabinet is a different measurement. Check the installation diagram for cabinet position, screen height and ventilation.
Choice A
LG, PU615U
CineBeam S
A tiny 4K triple-laser UST that turns shallow furniture into an 80 to 100-inch smart display with webOS.
- Best matched use
- Use a 40 to 59-inch image or a 4K source display
Checked facts
- Display resolution: 4K UHD
- Specified image size: 40 to 100 inches
- USB-C role: Display input and specified 20V/3.25A power input
- Power for a session: Supplied 65W USB-C adapter, no built-in battery
Choice B
Optoma, ML1080UST
Photon Go
A rare battery-powered UST with triple-laser color, Google TV and two 10W speakers for a small dark-room setup.
- Best matched use
- Start a short viewing session using the built-in battery
Checked facts
- Display resolution: Native 1080p with accepted 4K HDMI input
- Specified image size: 60 to 100 inches
- USB-C role: Power input only
- Power for a session: Built-in battery rated up to 1.5 hours, 100W PD external power
Meaningful differences
What changes the fit
| What changes | LG CineBeam S | Optoma Photon Go | Why it matters |
|---|---|---|---|
| Display resolution | 4K UHD | Native 1080p with accepted 4K HDMI input | Accepting a 4K signal does not make Photon Go display 4K pixels. |
| Specified image size | 40 to 100 inches | 60 to 100 inches | Only LG's range includes a 50-inch image. |
| USB-C role | Display input and specified 20V/3.25A power input | Power input only | A USB-C video cable can serve LG only when the laptop and cable support video. |
| Power for a session | Supplied 65W USB-C adapter, no built-in battery | Built-in battery rated up to 1.5 hours, 100W PD external power | Photon Go's internal battery can start a short session, but long films still need a power plan. |
| Built-in platform | webOS | Google TV | Check the household's actual streaming apps and subscriptions. |
What you give up
Every choice has a cost
If you choose LG CineBeam S
- A USB-C laptop connection still requires compatible video output and a suitable cable.
If you choose Optoma Photon Go
- A 4K input is displayed at native 1080p and USB-C does not carry video.
Recommendation switch
The decision flips if...
My planned image is 50 inches or I need USB-C video
Choose LG CineBeam S. LG supports that smaller image range and documented USB-C display input.
A short unplugged session is the main use
Choose Optoma Photon Go. Photon Go includes a battery, subject to its stated runtime limits.
What matters in practice
How to make the call
Choose CineBeam S for a small 40 to 59-inch setup, 4K display or a compatible laptop's USB-C video connection.
A USB-C socket can mean a different cable bag
LG lists USB-C display input, so a laptop with compatible USB-C video output can use a direct video cable. Photon Go's USB-C connection is for power only, so that same laptop needs an appropriate HDMI output or adapter for video. Choose LG if avoiding the HDMI adapter is important for repeated desk-to-wall use. Keep a separate projector power plan, since video over USB-C does not establish that the laptop can supply the projector's required power.
A two-hour movie exceeds the internal-battery brief
Photon Go's stated 1.5-hour battery time is shorter than a two-hour film even before allowing for setup or pauses. Choose it for shorter unplugged sessions, or budget a compatible 100W PD 3.0 external supply for longer viewing. LG uses its supplied 65W adapter and needs external power from the start. Choose LG when that is already available and its 4K display or smaller image range matters more.
A 50-inch wall rules out one of the stated ranges
CineBeam S specifies 40 to 100 inches. Photon Go starts at 60 inches. Choose LG for a planned 50-inch installation, while checking the exact body-to-wall and image-height diagram rather than using a generic throw-ratio calculation for a UST chassis.
What this comparison cannot tell you
- No head-to-head daylight contrast or noise measurement was performed. Battery time is a manufacturer maximum, not a guarantee.
What the facts say
What the comparison shows
Useful conclusions from the current home projectors comparison, followed by the checked facts used to reach them.
See the checked facts and calculation notes
| Product | Needs matched | Checked facts | Source records |
|---|---|---|---|
| LG CineBeam S |
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| Optoma Photon Go |
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Ready to choose?
Check the price. Read the owner reviews.
Open either model on Amazon to check the current price, customer reviews and delivery options.
LG CineBeam S
Use a 40 to 59-inch image or a 4K source display
See price & reviews on AmazonOptoma Photon Go
Start a short viewing session using the built-in battery
See price & reviews on AmazonLinks open in a new tab.