> When designing the 25th anniversary ThinkPad, which came out in 2017, Hill brought back the ThinkLight, but he actually wanted to have – for the first time – two LEDs instead of one. The dual lights would have eliminated shadows and provided even better illumination, but unfortunately, this effort proved too costly to make it into the final product.

Dual ThinkLights appeared on two models - W700 & W701: https://youtu.be/LSHP7VRs0bI?t=658

There was also a dual screen variant, which had a secondary screen that popped out to the right of the primary screen: https://youtu.be/mzhZH9LK1ac?t=26