The bike lights are powerful with multiple power settings. 2 to 3 hours comfortable use is to be expected, longer on low power settings.
The bikes will have small single Red LED lights fitted for the back when riding on the road. When off road these rear lights should be turned off so as to not distract following riders.e
Helmet lights have a 2 ~ 3 hr life on a moderate power setting, much longer when used on a low power level.