PentagonLight was a California maker of flashlights used by the military and law enforcement agencies. Their lights included lithium-powered handheld lights, tactical lights for guns, and an angle head flashlight.

In 2007, PentagonLight introduced a small LED angle head flashlight called.

This light is reminiscent of the widely issued World War II TL 122 or Vietnam vintage MX991U military flashlights. this light uses an LED as the light source and fits through PALS webbing for attachment on MOLLE vests and compatible equipment.

In April 2008 Surefire, LLC, sued PentagonLight for patent infringement and false advertising.

The suit was filed in the United States District Court for the Eastern District of Texas.

SureFire's suit alleged that PentagonLight willfully infringed upon SureFire's U.S.

Patent No.

RE 40,125 relating to SureFire's patented lockout tailcap switch.

The false advertising claim alleged that PentagonLight made false statements in its promotional materials indicating that its flashlights are "Made in USA."

In November 2008, a federal District Court imposed a ban prohibiting Pentagon Scientific Corp. from importing, making, using, offering for sale, or selling products that infringe on SureFire's lock-out tailcap patent.

PentagonLight agreed to permanently cease all production and sales of flashlights, thus shutting down their company within a few months of the decision.