HappyLight® mimics morning sunlight, so it’s best to use your HappyLight® before noon. It’s not recommended to use it for an extended period of time in the afternoon or evening because bright light suppresses melatonin (the sleep hormone) and may interfere with your sleep. However, it is okay to use it briefly in the afternoon (for 10-15 minutes) for a quick pick-me-up.
For light therapy to work, you need to use it daily, so it’s best to use your HappyLight® while doing another activity already built into your daily routine – like eating breakfast, working, reading, checking emails, watching TV, etc.
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