For years I've wondered if a fluorescent tube would be lit by radiation, without any wires, e.g. just by being next to a lot of nuclear waste. The principle is the same as Radium, the only difference is that the radiation would have to be intense enough to pass through the glass of the bulb.

EDIT: Also I find it funny that they are worried about how to warn people about this stuff thousands of years from now, when governments spent fifty years dumping barrels of radioactive shit into the ocean from the 1940s through the 1990s. And no, they knew better than to do this, even back then. It's like they did not care about my generation or the next two or three, while now we're suddenly concerned about hundreds of generations in the future.