The Microsoft founder answers questions on education, the NSA, and expensive guilty pleasures.
Gates, using the handle "thisisbillgates," opened the session saying, "Hello Reddit – I’m Bill Gates, co-chair of the Bill & Melinda Gates Foundation and Microsoft founder. Ask me anything."
Light bulbs you shouldn't buy
There are plenty of dimmable LED light bulbs, but make sure you don't buy the ones that flicker when you dial them down.