By greatest invention I mean something that had big and positive influence.
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I didn’t truly understand how much energy incandescent were burning. Grew up with nothing but those.
One night my AC crapped out in my tiny apartment so I killed the lights except one in a far corner. The air was so still I could reach my hand out and sense the heat from a 60W bulb.
the base of the lcd still gets way hot. makes me think they could be made even more efficient and hoping they will.