For first time users, we recommend starting out with 1-2 minute treatments per area and slowly working up to a 10-minute session over the course of 2 weeks as your body get used to the therapy. For standard use, 10-minute treatments at 6-12 inches from your device is optimal. An additional 10-minute sessions for symptomatic areas may be beneficial, but the evidence points to diminishing returns (your cells can only absorb so much light at once).