I am very disappointed.  I thought the extension arm was 26 inches and it is only 16.5, which isn't long enough to reach the area where I need the light.  I should have examined the sketch in more detail rather than take the measurement for how I understood it.  Unfortunately,  I totally unpacked the lamp before discovering this.  Now I need to repack it to return. Otherwise, it seems to be good quality and attractive.  But I cannot use it.