"Gospel's" Large Light Therapy Pad with Foam Lined Case"Gospel's" Large Light Therapy Pad with Foam Lined Case 12" X 17" (43. 2cm x 30. 5cm) has 264 LEDs! 120 visible red (660nm) and 144 near infrared red light (850nm). Visible red is absorbed by skin layers very efficiently and is best for uses such as stimulating trigger and acupuncture points and for treating wounds and infections. Near infrared light (850nm) penetrates to a deeper level and is very effective in treating concerns of tendons, ligaments,