Keep away from direct sunlight. Direct sunlight through the magnifier
lens may cause fire.Found on the back of a magnifying glass. what disturbs me is they printed the "Using handtools can be dangerous..." warning directly on the package, and then put the "Keep away from direct sunlight..." on the package as a sticker, as though it were an afterthought. "Oh, gee... you can use a magnifier to burn things in direct sunlight." I learned that in grade school. Raise your hand if you tried to burn anything / anyone with a magnifying glass in grade school? It's pretty much fundamental, right after reading and 'rithmatic.