F1 Start
Five lights out — react like a race driver.
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GGReflex F1 Start recreates the start-lights sequence from a Formula 1 grid. Five red lights come on one at a time, a second apart. At a random moment after the fifth light, all five go out together — that's your cue. React the instant they're gone. Move before that and it's a jump start: no time, and the whole five-light sequence restarts from scratch.
How it works
- Click, tap, or press space to begin. The five lights come on one by one, one second apart.
- Once the fifth light is lit, they all go out together after a wait of anywhere from 0.3 to 3 seconds, picked at random — the timing changes every attempt, so there's nothing to learn.
- React the instant the lights go out. Press anything before that, during the light sequence, and it's a jump start: the whole sequence restarts and that attempt scores nothing.
- It's one attempt per run. There's no averaging — your reaction to that single lights-out moment is the result.
Result: one reaction time, in milliseconds.
What your time is made of, and the myth we need to correct
You'll see it claimed everywhere that Formula 1 has an official 0.2-second reaction rule — that any driver launching within 0.2 seconds of lights-out is disqualified for anticipating the start rather than reacting to it. That specific rule does not exist in the regulations. What the FIA actually polices is movement: sensors on the car detect whether it moves at all between the lights coming on and going out, and any movement in that window is a false start, full stop. There's no fixed millisecond cutoff written into the rule — the trigger is motion, not a timer.
Formula1.com's own editorial content states that drivers react in about 0.2 seconds on average once the lights actually go out — but that's a figure from the sport's own website, not a telemetry study, and we're citing it as exactly that: an official claim, not a measurement. Driver-by-driver reaction tables that circulate online, with specific names and specific milliseconds attached, trace back to pages with no data source behind them. We're not repeating those.
Our own clock works the same way every reaction test on this site does: it starts the moment the lights turn off in code and stops when your browser reports the press, so your monitor's refresh rate and your mouse or keyboard's response time are baked into the number along with your reaction. We don't subtract any of it.
What counts as a good time here
Our own tiers for this game start at Elite under 180 ms, Pro under 220 ms, Sharp under 260 ms, and down to Sleepy past 350 ms. We set those cutoffs ourselves; they aren't drawn from any study of drivers or of anyone else, and you should treat them as a scoreboard label, not a scientific one.
If you want an actual reference point, the closest defensible one is the roughly 0.2-second figure Formula1.com itself publishes for drivers reacting to lights-out — again, an official-site claim rather than a lab measurement. A healthy adult reacting to a simple visual cue under laboratory conditions typically lands around 210–230 ms, which puts a good result on this test in roughly the same neighborhood as a driver's average start, once you remember that neither number has its hardware lag subtracted out.
Jump starts, and why one attempt is unforgiving
- Press anything while the lights are still coming on and it's a jump start — no score, and the five-light sequence restarts from the first light.
- The random delay after the fifth light — 0.3 to 3 seconds — is re-rolled every attempt specifically so you can't count it out in your head and guess it.
- Because it's a single attempt, one good or bad reaction is your whole result — there's no average to smooth out a lucky guess or a distracted moment.
That makes this test a poor way to measure your reaction time precisely, and a decent way to feel what a real start actually asks of a driver: react to a light going out, not to a countdown you can predict.
Frequently asked questions
Is there a real 0.2-second reaction rule in Formula 1?
No — that's a persistent myth, and it isn't in the regulations. The actual rule is about movement: sensors detect whether the car moves at all between the lights coming on and going out, and any movement in that window is a false start, regardless of how many milliseconds it measures. There's no fixed reaction-time cutoff written into the rule anywhere.
What counts as a jump start on this test?
Reacting any time before all five lights go out — while they're still coming on — is a jump start here, the same as in real F1. The attempt scores nothing and the whole five-light sequence restarts from the first light, at a new random delay.
How long do the lights stay on before it's time to go?
The five lights come on one second apart. After the fifth one, there's a random wait — somewhere between 0.3 and 3 seconds — before they all go out, and that delay is re-rolled every attempt, so there's no rhythm to learn.
What is a good F1 start reaction time?
Formula1.com's own editorial content puts drivers at roughly 0.2 seconds on average once the lights go out — that's an official-site figure, not a telemetry study, so treat it as a claim rather than a measurement. Our own Elite tier on this test starts under 180 ms, but we set that number ourselves for this game; it isn't a research threshold.
Why is this only one attempt instead of an average?
Because a real start is one attempt too — there's no retry once the lights go out for real. It makes the test unforgiving: a single slow reaction or a lucky guess is your whole result, with nothing to average it against. If you want a stable number, run it several times and look at the spread, not any single attempt.
Can I trust the driver-by-driver reaction time tables I see online?
No. Tables that list specific milliseconds for specific drivers trace back to pages with no data source and no methodology behind them. We haven't found a legitimate one, so we don't repeat those numbers here.