How to play
Lights Out is a go-signal game. Five lamps light in sequence, then pause for a random beat, then all turn green. You tap, click, or press Space the instant they do. Go early and it is a false start. The number is your reaction time in milliseconds. It is a casual browser game for a spare minute — not a medical test, and not an official start system for any championship.
- Watch the five lamps come on, one after another.
- After a random pause they all turn green. Tap, click, or press Space the instant they do.
- Go too soon and it is a false start. Lower time is better.
Controls
Watch the lamps. When they all turn green, tap the board, click, or press Space.
Tips
- Keep your eyes on the lamps, not a clock.
- Wait until every lamp is green. An early tap is a false start and does not count.
- Space, a click, or a tap on the board all register the same way.
- The pause changes every run, so the first attempt is often the jumpiest.
Scoring
Lower milliseconds is better. False starts do not count as a time. Best time stays on this device.
Questions
- How do you play Lights Out?
- Watch five lamps light one after another. After a random pause they all turn green. Tap, click, or press Space as soon as they do.
- What is a false start?
- Tapping before the lamps turn green. That attempt does not count as a reaction time. Start the lights again and wait for green.
- Is a lower time better?
- Yes. The number is milliseconds from green to your tap. Your best time stays on this device.
- Is this an official racing or medical test?
- No. It is a casual browser game. It is not a medical measurement, and it is not affiliated with any motorsport championship or governing body.
Want a longer walkthrough? How Lights Out Measures a Tap.