This depends on your goal: for seasonal low energy or energy dips use the EnergyUp at least 20-30 minutes per day. If you're staying in, you can have it on all day.
How long should I use Philips EnergyUp?
Published on 2017-11-14
Note:
Do not use Philips EnergyUp in the last few hours
before bedtime. See instructions for use for more details.