Your projector is what turns a launch monitor and impact screen into an actual simulator experience. Get it wrong and every session is a fight with blurry images, washed-out colours, or shadows across your hitting zone. Get it right and the room feels like a real bay. This guide covers exactly what you need to know — throw ratio, brightness, mounting, and which models work best in real home simulator setups.
The one spec that determines everything else: throw ratio
Throw ratio is the relationship between how far the projector sits from the screen and how wide the image is. A throw ratio of 0.5 means the projector needs to be half the image width away from the screen. For a 10 ft wide screen, that's 5 ft of throw distance.
Why this matters: in a golf simulator, the projector needs to be out of the hitting zone — either ceiling-mounted behind the golfer or floor-mounted in front of the screen. Standard throw projectors (ratio 1.2–2.0) need 10–20 ft of distance to fill a large screen, which means either the projector ends up in your swing path or you need a very long room. Short-throw projectors (ratio 0.4–0.8) fill the same screen from 4–8 ft, which keeps the unit safely outside the hitting zone in most standard rooms.
For home simulators, you want a throw ratio between 0.4 and 0.8. Anything above 1.0 will be difficult to position safely in a standard garage or basement bay.
Throw distance calculator
Use this table to understand what throw distance each ratio requires for common screen sizes:
| Throw ratio | 10 ft screen | 12 ft screen | 14 ft screen | Typical models |
|---|---|---|---|---|
| 0.47–0.50 | ~4.7–5 ft | ~5.6–6 ft | ~6.6–7 ft | BenQ LH820ST, Optoma GT2000HDR |
| 0.69–0.83 | ~6.9–8.3 ft | ~8.3–10 ft | ~9.7–11.6 ft | BenQ TH671ST |
| 1.0–1.5 | ~10–15 ft | ~12–18 ft | ~14–21 ft | Standard consumer projectors |
Brightness — how many lumens do you actually need
The marketing answer is "more is always better." The practical answer depends on your room's lighting conditions.
Fully controlled lighting (dedicated room, blackout): 2,000–3,000 lumens is plenty. A bright projector in a dark room creates too much contrast and eye fatigue in long sessions.
Semi-controlled (garage with some daylight, basement with a window): 3,000–3,600 lumens. This is where most home builds sit. At this brightness you can play with modest ambient light and still get a clear image.
Poor lighting control (windows, open door): 3,600+ lumens helps, but the better fix is to control the light rather than fight it with brightness. No projector fully overcomes direct sunlight.
The three models reviewed on this site — BenQ LH820ST (3,600 lumens), Optoma GT2000HDR (3,500 lumens), and BenQ TH671ST (3,000 lumens) — all sit in the right range for typical home simulator use.
Lamp vs laser — the technology decision
Most projectors at the budget end of the golf simulator market use lamp-based light sources. Most mid-range and premium models use laser. The difference matters more than most buyers expect.
Lamp projectors (BenQ TH671ST): Lower upfront cost. The lamp dims over time — typically 50% brightness loss after 2,000–4,000 hours in normal mode. Lamp replacement costs $50–$150 and is needed every 2–4 years for regular users. Lamp projectors also need a warm-up period of 30–60 seconds before they reach full brightness.
Laser projectors (BenQ LH820ST, Optoma GT2000HDR): Higher upfront cost, but no lamp replacement. Laser maintains consistent brightness for 20,000–30,000 hours — typically 10+ years of regular use. Instant-on with no warm-up. Better dust resistance since the light source is sealed. For a permanent simulator installation, the lifetime cost of laser is often lower than lamp when you factor in replacements.
Mounting — where to put the projector
There are three practical mounting positions for a golf simulator projector:
Ceiling mount behind the golfer: The cleanest installation. The projector hangs from the ceiling behind the hitting position, angled forward toward the screen. No risk of the golfer shadowing the image. Requires a ceiling mount bracket and cable routing to reach the PC. Works well with both short-throw and standard-throw projectors depending on room length.
Floor mount in front of the screen: The most common position for short-throw projectors. The unit sits on the floor between the hitting mat and the screen, projecting upward and back toward the screen. Requires a protective enclosure (Carl's Place and others make floor mount guards specifically for this). Keep the projector at least 4–5 ft from the screen position to stay out of the hitting zone.
Enclosure frame mount: Some enclosure systems (Carl's Place Pro enclosures) have integrated projector mount points on the top frame. Clean, permanent, and keeps cables organised. Works if your enclosure and projector are compatible.
Key specs to compare
| Spec | BenQ TH671ST | Optoma GT2000HDR | BenQ LH820ST |
|---|---|---|---|
| Price | ~$950 | ~$900–$1,100 | Discontinued (refurb available) |
| Resolution | 1080p | 1080p | 1080p |
| Brightness | 3,000 lumens | 3,500 lumens | 3,600 lumens |
| Throw ratio | 0.69–0.83 | 0.496 | 0.497 |
| Light source | Lamp | Laser | Laser |
| Light source life | 10,000 hrs (eco) | 30,000 hrs | 20,000 hrs |
| Input lag | 16.67ms | <16ms | 16.67ms |
| HDR support | No | HDR10 + HLG | No |
| Golf mode | No | No | Yes |
| Dust protection | Standard | Standard | IP5X sealed |
Which projector for which room
Budget build, room with controlled lighting: The BenQ TH671ST at ~$950 is the right starting point. Lamp-based means occasional replacements, but the upfront cost leaves more budget for your launch monitor or enclosure. Works well in rooms 10–20 ft deep from projector to screen.
Mid-range build, garage or semi-controlled lighting: The Optoma GT2000HDR at ~$900–$1,100 offers laser reliability at a competitive price. HDR support improves course visuals noticeably. The 0.496 throw ratio matches the LH820ST for tight positioning. This is the best all-round value in the current market now that the LH820ST is discontinued.
Premium build, dusty garage environment: The BenQ LH820ST was the benchmark for garage builds thanks to its IP5X dust sealing — critical for garages where door opening and stored gear creates dust. It has been discontinued but refurbished units are still available. If you find one, it remains an excellent choice. For new purchases, look at the BenQ AH500ST as a current alternative.
Frequently asked questions
Do I need a short-throw projector? For most home simulator rooms — yes. A standard projector with throw ratio 1.5+ needs 15–20 ft of clear distance to fill a 10 ft screen, which usually puts it inside the hitting zone. Short-throw projectors (0.5–0.8) keep the unit safely positioned while filling the screen from a short distance.
Does projector quality affect my launch monitor readings? No. The projector and launch monitor are independent systems. The monitor reads ball and club data; the projector displays the simulation output. Poor projector image quality affects the playing experience but not data accuracy.
What resolution do I need? 1080p is the standard and is sufficient for every simulator software platform. 4K projectors exist for golf simulators (BenQ LK936ST), but the image improvement is minimal on a 10–12 ft screen at typical viewing distances, and the cost premium is significant.
What about input lag? For simulator use, input lag under 20ms is ideal. All three models reviewed here are at or under 16.67ms, which is imperceptible in practice. Standard home theatre projectors often run 50–100ms, which creates visible lag between swing and simulated ball flight.
We've done the research. Here are our recommendations by room size and budget.