I was having a watch on this product since long time, but on reading the reviews i was a bit confused to spend such a big amount on a lamp. The main concern for me was the luminicity(THe amount of light it will emmit), but to be honest it has quite a powerfull light,and can brighten up a moderate sized room.
No doubt its a lamp and not a light so dont expect from it to do task of a CFL or Tubelight. But still its bright enough that if placed in your bed room you can very well read a book or see things in your room.
Also it has dimming option so its upto you how much bright you want the light to be.
In terms of Quality I would say Excellent. I really enjoyed its finishing and shape and size.
For changing colours well its like the whole spectrum so its up to you which colour you want. so no worries on that.
I would definately recomment it to all. It has a kind of Class in it to be placed in your living or bed room.(again it depends how you display and use it).
In all a wise purchase worth doing.