I agree with the statements made about it’s all about the current (amps) requirements of a given device. But when you think about a flashlight that runs on 4.5 volts from a 650 milli-amp battery and lasts more than a week of steady use, I would expect those type of LED would have a much lower current draw. But I have never seen specs that list a given LED current draw, have you?
I come from a background of back-country Canoe camping in British Columbia and there is no TV or Radio or Phone service. I have no use for such things when camping. I am just tired of sleeping on the ground in a tent and age is starting to dictate what I am able to do .