So someone, forgot who, once talked about how he wanted a lamp thing and wondered how one would go about it. I suggested an idea, but he said that's not what he's looking for, and so here's the idea.

It will be in installations. A few scvs or probes will all together possess one lamp. The players are perhaps limited a certain time before they have to find another lamp... any player that does not possess the lamp has shared vision turned off on himself, so sticking close to the lamp holder would be best. The lamp holder also has the option to pass on the lamp. So what happens when players have no lamp? If they're smart enough to number their unit, then they can still navigate in the dark... through various traps. The game will consist of traps and sometimes forciful break-ups of the group.

This is not a difficult concept, but I'd like to know if anyone's already done it

Cool idea, I've seen 'dark' used in a few maps, as a temporary superweapon or as an extra degree of difficulty in the last bit of a map [there was a cat and mouse map that utilised this]

Mars Survive 3 with Day and Night mode activeated. A drone is created with a Klydarian crystal from the vision comp when you build a Comsat.

So yea its been done, but nobody cares if you do it as well.

Sounds like fun! I'll test it if you want

Sounds like Final Fantasy Crystal Chronicles.