I recommend this air purifier/ humidifier to everybody. I had the previous model without the LED lights for nearly 9 yrs. when i saw a larger model with lights which can adjust to seven colors or be kept on any given color or no color at all, i had to have it. This air purifier is powerful, yet, quiet..cleans the air and humidifies it.. I always put a few drops of essential oil in mine and how nice the smell along with the lights, very relaxing. This model size covers my 20 x 20 family room. I purchased this quite earlier this year and the only time i shut it off is to empty and clean it. My smaller model New Comfort air purifier/ humidifier is still running now in my den and kitchen! Thank you New Comfort. You far surpass the rainbow air purifier, which i had for a year until it ceased working a yr later..and thats when i found New Comfort Air purifier/ humidifier.. now the largest one comes with optional lights and pretty much at the same price as their first model.This company makes the best one! It really does clean the air (you can see it in the water) and definitely humidifies!