Dezerae 17.5" Silver Desk Lamp, LED Desk Lamp - Swing Arm Architect Lamp with Clamp - Adjustable Natural Sun Lighting for Home Office, Bedroom, or Dorm Room

I'm not sure which part of the lamp is considered 'rotatable arm', other than the lamp head itself. This lamp will not rotate at the base - it also isn't that secure since it's anchored barely over an inch into the clamp mount. Even assuming you don't need to rotate the lamp at the base, flexing the arm itself at either of the 3 joints leading to the lamp head, or adjusting AT the lamp head causes the entire lamp to wobble which loosens the base. The core problem with the lamp is the anchor point. One inch isn't nearly enough for the effective load force (even when not moving it), nor is the small thumb screw adequate to tighten it enough to overcome the same load force. I returned it. Oh, and Wayfair shipped it to me in a box that was already cut open on both sides (see photo).

Very sleek. Tall and out of the way. Good amount of light dispersed over a 3’ area. Fits my needs perfectly.

Great lamp, nice and bright and very little assembly.

The lamp is great. It looks modern and stylish, and most important, it solved a huge problem with limited space on my desk. By clamping onto the edge rather than sitting on the desk itself, it freed up a ton of desk space. My one complaint is that the button that turns the lamp on and off and dims it doesn't always react to my touch. So I often have to tap it multiple times to get it to turn on or shut off. It's a minor inconvenience though so long as it continues to work.

I simply love this lamp! It puts off the nicest light on my work station. Plus, I use it as a background light for Zoom calls and it works amazing.

I am very impressed with how much light it gives and how you can select how much light you want. Great for smaller desks with not too much space for a full desk lamp.

Very bright and kind to eyes. Recommend this to everyone

Nice size light fixture and provides good lighting.

This lamp works great. Perfect for what I need it for!

This fits well on my desk and can be moved easily. Works great in adding light for my Zoom calls. And great light for my office overall.