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.
Red light treats the histamine reaction allergies cause. It reduces itchiness, redness, sneezing, coughing, and mucous production. It does not matter if pet dander or pollen triggered the allergies as red light treats the histamine response.