With perfect efficiency a 10 kg weight lifted 2 meters would only output about a... | Hacker News

Hacker Newsnew | past | comments | ask | show | jobs | submit

		nohat on Dec 7, 2012 \| parent \| context \| favorite \| on: Gravity Light - Alternative form of lighting to re... With perfect efficiency a 10 kg weight lifted 2 meters would only output about a tenth of a watt over half an hour. That is indeed enough for a led, but not a very powerful one. I doubt this is worth it.

pdonis on Dec 8, 2012 [–]

See the numbers upthread; it's comparable to a kerosene lamp.

Guidelines | FAQ | Lists | API | Security | Legal | Apply to YC | Contact