How the start lights test works
Five pods of red lights sit across the gantry. When you line up, they come on one at a time, a second apart, until all five are lit. Then comes a short pause of random length, and all the lights go out at once. That is the start. Click, tap or press the space bar the instant you see them go out, and your reaction time appears in seconds, to the thousandth, the way race timing shows it.
You get three starts, and your score is the average. Press too early, while the lights are still on, and it is a jump start: the screen flashes, the start does not count, and you line up again. It is the same moment racing drivers face on the grid, and the hard part is the same too. Everything in you wants to go as the fifth light comes on, and the pause is there to catch you.
The test is timed exactly like the Reaction Time Test: the clock starts at the instant the lights go out and stops at your press, and the lights switch off instantly with no fade, so nothing blurs the moment being measured.
Where your start puts you on the grid
| Average reaction | Grid position |
|---|---|
| Under 170 ms | Pole position |
| 170 – 200 ms | Front row |
| 200 – 230 ms | Points finish |
| 230 – 270 ms | Midfield |
| 270 – 330 ms | Backmarker |
| Over 330 ms | Stalled |
A browser test includes the delay of your screen and your mouse or touchscreen, which adds a few tens of milliseconds for everyone. Compare your score with other browser results rather than with on-track timing, which measures something different.
How to get a faster start
- Watch the lights, not your hand. Keep your eyes on the pods and let your finger rest on the button so the press is one small movement.
- React, do not predict. The pause is random. Trying to guess it leads to jump starts; waiting for the lights to go out is faster on average.
- Relax before the fifth light. Tension slows you down. A loose finger moves quicker than a clenched one.
- Use a wired mouse or a fast screen. Wireless mice and slower displays add delay you cannot react your way out of.
- Take the average seriously. One lucky start is easy. Three quick ones in a row is the real test.
For a pure measure of reaction speed without the build-up, try the Reaction Time Test, and for a test of keeping time rather than reacting, the Rhythm Test.
Benchmento is an independent site and is not affiliated with Formula 1, the FIA or any racing series. Formula 1 and F1 are trademarks of their owners and are used here only to describe the kind of start being recreated.
Frequently asked questions
Is this the F1 reaction test?
It works the way a Formula 1 start does: five red lights come on one after another, hold for a moment, and the race starts when they all go out. Benchmento is not affiliated with Formula 1; this is an independent reaction test built around the same idea.
What is a good start lights reaction time?
An average under 200 milliseconds is very quick and puts you on the front row of the grid here. Most people land between 230 and 300 milliseconds. Racing drivers’ start reactions are often quoted at around two tenths of a second, but their number includes the car, not a mouse and a monitor.
What counts as a jump start?
Pressing at any point before the lights go out, including while they are still coming on. A jump start does not count: the start is simply run again. The result shows how many you made.
Why is the pause before lights out random?
So you cannot time it. If the lights always went out after the same pause you could learn the rhythm and press before you saw anything. A random hold of 0.2 to 3 seconds means the only way to be fast is to react.
Is it the same as the Reaction Time Test?
It measures the same thing, the time from a visual signal to your press, and it is timed the same way. The difference is the build-up: watching the lights fill tempts you to go early, so it tests your patience as much as your speed.