Very warm. Think of a sauna. I like it for that only. It's hanging above my bathroom and I really like the way it looks and the way the room looks. RED LIGHT. ROOOXANNE. TURN ON THE RED LIGHT! However, if you're searching for "light therapy," you need to figure out which nanometer is right for your specific needs. For example, 660nm red light therapy to improve skin condition associated with rejuvenation. That's my 2 cents. (This is my second order of this lamp, the first lasted 6 months)