Best Short Throw Projector for a 10-Foot Golf Sim: the BenQ LH820ST

If your garage, basement, or spare bedroom has a 9–10 foot ceiling, your golf-simulator projector choice is more constrained than most YouTube build videos let on. Long-throw home theater projectors won't fit, ultra-short-throw projectors are too bright in your peripheral vision, and most short-throw projectors miss either the lumens, the offset, or the throw ratio you actually need. The BenQ LH820ST hits all three — and that's why it's the projector most veteran sim builders recommend for a 10-foot ceiling room.

Why the throw ratio matters in a 10ft room

A standard living-room projector with a 1.5+ throw ratio needs 18–21 feet of room depth to project a 14-foot-wide impact screen. The LH820ST's 0.81–0.89 throw ratio cuts that almost in half. For a typical golf-sim room — say 16 feet wide and 10 feet tall — the LH820ST mounts roughly 11 feet from the screen, leaving 5+ feet of stance space behind it. That's enough room to swing a driver without your follow-through ever drifting near the lens. Pair that with a 108% vertical offset and the projector sits flush against the ceiling, projecting downward onto the screen with no keystone correction needed.

Specs that matter for a sim

• Throw ratio: 0.81–0.89 (perfect for tight rooms)
• Vertical offset: 108% (lens flush with ceiling, image projects downward)
• Brightness: 4,000 lumens (handles ambient light from windows or shop lights)
• Resolution: 4K UHD (3,840 × 2,160)
• Light source: laser, rated 20,000 hours
• Native aspect ratio: 16:9

The 4K resolution is technically overkill at the typical 6-foot viewing distance, but the laser longevity and high lumen output are what make this projector shine for sim use. Brightness matters — golf-sim rooms are usually well-lit during the day, and a 3,000-lumen projector will look washed out behind a typical 1.0-gain impact screen.

Why a laser projector pays for itself

Lamp-based projectors lose ~30% of their brightness in the first 1,000 hours, and the bulbs cost $200–$300 to replace every 2,000–3,000 hours. If you play 30 minutes a day, that's a bulb every 6–9 months. The LH820ST's laser hits 80% brightness at 20,000 hours — roughly 27 years at the same usage — so over the life of the projector you save several thousand dollars in lamp costs. That's the math that flips this from a "luxury" pick to the obvious long-term choice for daily players.

How it stacks up

Against the Optoma GT1080HDR, the LH820ST is roughly 4× the price but delivers 4K vs 1080p, laser vs lamp, and stronger lumens. If you're casual or budget-constrained the GT1080HDR wins; if you'll use the sim 5+ times a week, the LH820ST wins on total cost of ownership. Against the BenQ TK700STi, the LH820ST is more expensive but trades the gaming-focused features for laser durability and higher brightness. If you mostly play golf and not console games, the LH820ST is the smarter pick.