Does Brighten and Dim
I've just seen a couple reviews that say the item doesn't dim or brighten or that it isn't actually 10,000 lux.  If you press and hold the black touch button on top it brightens all the way up or dims back down depending on the current setting.  A quick press will power it off.  These instructions are found in the provided manual.  It does not have a timer function.  I have a $100 10k lux lamp and compared the brightness to it and this lamp is actually brighter on it's brightest setting, but slightly lower on the kelvins rating as it is a tad bit yellower, whereas my other one is very blue.  Best guess would be that one is 6000 kelvins and this one is more like 5000.  Which I actually like better.  It's more like the actual sun.  I also like that it has a metal bar on the base which is actually meant for propping it up on a flat surface, but I used to wedge it on top of my computer monitor so that while I'm working the light shines into the top of my eyes which studies have shown provides the most seratonin benefit (like the sun shines from above, not below).
Rating: 5 stars