I purchased two of these lamps, for the possible air purifying capabilities and sinus relief particularly after a recent sinus surgery. They provide a wonderful soothing light that can be as bright or as low as you wish as it comes with a dimmer. They are a substantial weight and it is recommended that a coaster be placed underneath it. I leave them on during the day and dim them at night.  They are a nice conversation piece for those who do not have one. Remove the lamp from the box immediately as they tend to sweat and you may end up with salty palms! I did notice a difference after using the lamps for a week and then being away from them for two days. it may be wishful thinking on my part, but my sinuses feel better and the cat has stopped sneezing as well!