How long does Modvigil keep you awake?

https://www.smartfinil.net/product/modvigil-200/

Modvigil 200 will keep you up for ten to fifteen hours. Its effects normally start within 30–60 minutes, peak after 2–4 hours, and then fade off. Because of its extended duration, taking Modvigil 200 later in the day may cause problems falling asleep or decreased sleep time, especially in sensitive individuals.