830-nm and 633-nm light-emitting diode phototherapy for psoriasis

"Combination 830-nm and 633-nm light-emitting diode phototherapy shows promise in the treatment of recalcitrant psoriasis: preliminary findings”

“Clearance rates at the end of the follow-up period ranged from 60% to 100%. Satisfaction was universally very high. The antiinflammatory effects of LED energy at 830 nm and 633 nm have been well documented, as has their use in wound healing. LED phototherapy is easy to apply, pain free and side-effect free, and is well tolerated by patients of all skin types.”

https://pubmed.ncbi.nlm.nih.gov/19764893/