Light therapy heals with photons. A red incandescent bulb throws more heat than light, so it’s not likely to have a light therapy effect. Yes, you can use light therapy to reduce acne scars. Traumatic brain injury, Parkinson’s and dementia respond to red and infrared light therapy.
A dose of red light therapy is a quantity of energy measured in joules from light with a wavelength of 600 to 1200 nanometers. Whether the dose we just defined is actually helpful to the body depends on the wavelength being the right one for the target treatment, and the energy quantity being sufficient to kick off energy-creation and healing cascades of events.
Red light mechanism: Mitochondria absorbs the light at cytochrome c oxidase (CCO), and increases membrane potential. Lght activates heat/light gated channels.
Low level light therapy works on multiple energy and skin building processes to heal wounds and improve skin conditions. This article discusses 830 nm (infrared) light wave results.