Not all Streamlights are USA made. It used to be they listed if each product was assembled in the USA or manufactured in the USA. They no longer do that.
Previously mentioned Strion for example, says this in its fact sheet: "Engineered in the USA, manufactured in China."
I'm a big advocate for more transparent manufacturing location information. In the world of mountain bikes, this has become a silent slide towards overseas manufacturing, and consumer acceptance of such. Very few manufacturers mention where stuff is made, and so people seem to assume "oh they are based in the USA so they must be made in the USA" - nope. Then, when a manufacturer like Guerrilla Gravity comes along and actually makes an affordable, modern carbon MTB right in Colorado, people just kind of assume they are made where everybody else makes their bike, only they have a goofy logo and name. Not so - they are manufactured in Colorado, which is very unique for the industry, and only Reeb, Ventana, Foes, Lenz and a handful of others can claim "mass produced (ie somewhat affordable) in the USA." Sure, you can find smaller custom bike builders who still make stuff in the USA, but often times they are very expensive.
For Flashlights, the only well known producers of Made in USA torches are Maglite (Ontario, CA) and SureFire (Fountain Valley, CA). See the list above for others.
So yea, don't go assuming that just because a product used to be Made in the USA that it is anymore, and certainly don't pay more for such a product that you can get direct from the manufacturer for less money, especially if the USA based "brand" can't back up its warranty.