Beam angle affects how light intensity decreases over distance. A wide beam angle (e.g., 90 degrees) disperses light quickly, reducing power density over distance, which is not ideal for therapeutic use. Conversely, a narrow beam angle (e.g., 30 degrees) can cause discomfort and potential safety issues due to concentrated light intensity. BlockBlueLight Panels use a 60-degree beam angle, striking a balance that ensures therapeutic power density at further distances while maximizing comfort and safety.