The sequence lasts between 9 and 30 seconds so that if you have more of them on the layout they won't all change at once. If you would like a pair of working Traffic Lights, then you might consider TTTL10P Traffic Lights Set.
The Train Tech TL10 Traffic Light (OO) Single product would be ideal for railroads, outdoor enthusiasts, or makers looking for a safe and practical traffic light solution for decorative or functional purposes.