My aesthetician at an expensive medical spa used a nearly identical device. After consulting an engineer friend who assured me the science was the same, I looked for a LED light with the most lights possible and decided to give this one a try.I have battled a chronic inflammatory condition that leaves acne scars and discoloration for 20+ years. Many doctors, salves, ointments and treatments later, the advances were meager. So my expectations were low, but I am wonderfully surprised by the results. After using the light daily for just 2 weeks on my face, hands, feet and lower legs, inflammation is greatly reduced, blemishes are disappearing and the overall texture and discoloring are evening out. I look like I've had a face lift!I highly recommend this light. It's well worth the price, and is very easy to put together. The color options are Red /Blue / Green and Color. The color button has several options, just push it repeatedly until you find the color light for which you're searching. I suggest the manufacturer add a laminated card to the packaging explaining the advantages of use for each color. I keep referring to picture on the Amazon product page.I'm very happy with my purchase!