I have this lamp on my desk so that I can do uni work without having to have my room light on; it works great for that! There are three "modes" that the lamp can be in, each corresponding to a level of brightness. You can tap anywhere on the base of the lamp to switch which is easy to use and nice to have. The third mode (the brightest) illuminates my whole desk area which is perfect. While I don't use the RGB mode, it is there if you wish to use that and I can confirm that it looks pretty cool.
It's worth noting that this uses an LED which is preinstalled meaning there's no need for traditional bulbs (and as such is rated to last a long time) thus meaning you won't have to keep changing bulbs.
This lamp is excellent and is worth the $40 in my opinion!