the duration and brightness numbers for this don't add up either
They do if you're comparing it to a kerosene lamp; kerosene has certainly not been "replaced" in parts of the world that don't have easy access to batteries or electricity in general. See the numbers elsewhere in the thread. And it apparently does use an LED light.
They do if you're comparing it to a kerosene lamp; kerosene has certainly not been "replaced" in parts of the world that don't have easy access to batteries or electricity in general. See the numbers elsewhere in the thread. And it apparently does use an LED light.