Red light therapy is real. Most home devices don't deliver enough light to actually work.

If you use red light for skin, move the device to within 15cm of your face — not the arm's length most consumer guides suggest. That single distance change is the difference between therapeutic and decorative. THE VERDICT ONE-LINER: Red light therapy is real. Most home devices don't deliver enough light to actually work.

1. The number that changed my mind: Every study confirming 31.6% fewer wrinkles and near-double strength recovery speed used devices pressed directly against tissue — not the arm's-length use that consumer guides recommend.
2. What most people get wrong: Home panels at arm's length deliver roughly 5% of the light intensity used in those studies — below the minimum threshold to reach skeletal muscle.
3. What to actually do about it: Use skin devices within 5-15cm of your face and recovery devices within 5-10cm of the target muscle — and unlike ice baths, red light won't slow your gains.

Think of light intensity like a garden hose nozzle from across a room. At two feet the jet reaches you with force. At twelve feet the same nozzle disperses into a mist — same water, a fraction of the impact. Red light follows the same physics: clinical researchers press devices against skin at 20-200 mW/cm². Consumer marketing shows people standing across the room at 3-10 mW/cm². The science is identical. The delivery is not.