When Makita first released their power drills with the little LED headlight, I dismissed it as an unnecessary gimmick; but after actually using it, I found it surprisingly useful and will never buy a drill without one. Even in a well-lit space, the underside of objects are always poorly illuminated and the LED makes all the difference.
Craftsman is betting that people will discover the same utility in hand tools, and now has long nose, diagonal, and linesman pliers equipped with onboard lighting. An LED module—sealed in case you're working outside in the rain, or cutting something that may spurt fluids&—is cleverly tucked into the tool's hub. In the video below (where they have rather embarassingly spelled "forged" as "foraged") you can see the light's placement starting around 0:28:
The LED requires three watch batteries, user-replaceable, for juice and run about 35 bucks.