"How many lumens do I need?" is the single most common projector question we get from golf simulator builders. The answer depends on your room, your screen, and how much ambient light you're dealing with. Here's a straightforward guide based on thousands of projectors we've sold.
Not sure which projector is right for your setup? Our Find My Projector tool matches the projectors we carry to your room size, budget, screen, and ambient light.
The Short Answer
For a dedicated sim room with controlled lighting (blackout curtains, no windows, overhead lights off during use): 3,000-3,500 lumens is plenty. This covers most home builds.
For a room with some ambient light (garage with windows, basement with walkout, room with lights partially on): 4,000+ lumens will keep the image vivid.
For a commercial venue or brightly lit space (overhead fluorescents, large windows, high foot traffic): 5,000-8,200 ANSI lumens from the Optoma ProScene lineup.
Lumens by Room Type
| Room Type | Recommended Lumens | Example Models |
|---|---|---|
| Dedicated dark sim room | 2,800 - 3,500 | BenQ AH30ST, Optoma GT2000HDR |
| Basement with some ambient light | 3,500 - 4,000 | Optoma ZW350ST, BenQ AH500ST |
| Garage with windows | 4,000+ | BenQ AK700ST, BenQ LK830ST |
| Multi-purpose room (lights on) | 4,000 - 5,000 | BenQ LK936ST, Optoma ZU507TST |
| Commercial venue / teaching studio | 5,000 - 7,200 ANSI | Optoma ZU607TST, Optoma ZK810TST |
| Large venue / 200"+ screen | 6,900 - 8,200 ANSI | Optoma ZU820TST, Optoma ZU920TST |
ANSI Lumens vs Rated Lumens
Watch out for this: some manufacturers list rated lumens (their own measurement) while others list ANSI lumens (standardized industry measurement). ANSI lumens are typically 15-25% lower than rated lumens for the same projector.
For example, the Optoma ZU920TST is rated at 9,800 lumens but measures 8,200 ANSI lumens. Both numbers are "correct" — just different standards. When comparing projectors, make sure you're comparing the same measurement type.
Does Screen Size Affect How Many Lumens You Need?
Yes. A larger screen spreads the same light over a bigger area, so the image appears dimmer. A projector that looks brilliant on a 100-inch screen will look washed out on a 200-inch screen.
Rule of thumb: For every 30% increase in screen area, add about 1,000 lumens to maintain the same perceived brightness. If 3,500 lumens looks great on your 100-inch screen, you'd want about 4,500 lumens for a 130-inch screen in the same room.
Laser vs Lamp: Brightness Over Time
This is where light source matters beyond just the spec sheet:
- Laser projectors maintain close to their rated brightness for the entire 20,000-30,000 hour lifespan. A 3,500-lumen laser projector will still be around 3,200 lumens after 10,000 hours.
- Lamp projectors lose 20-30% of their brightness within the first 2,000 hours. A 4,000-lumen lamp projector might output only 2,800 lumens by the time you replace the bulb.
This means a 3,500-lumen laser projector often outperforms a 4,000-lumen lamp projector in real-world use after the first year. Read our Laser vs Lamp vs LED comparison for the full breakdown.
Our Brightness Recommendations by Budget
- Under $1,200: The Optoma GT2000HDR at 3,500 lumens laser is the best value. Bright enough for any dedicated sim room.
- $1,500-$2,500: The BenQ LK830ST at 4,000 lumens 4K laser handles ambient light well.
- $3,000-$5,000: The BenQ LK936ST at 5,100 lumens is the brightest home-class 4K projector.
- $5,000+: The Optoma ProScene lineup goes up to 8,200 ANSI lumens for commercial installations.
Still Not Sure?
Call us at 1-888-871-6110. Tell us your room dimensions, ceiling height, screen size, and whether you have windows or ambient light. We'll recommend the right brightness level for your specific setup.
