What do Icons on left side of post mean

[Marvinspu36]

What does the "LED" icon in the lower left corner of each post mean? Some are gray, some are green, and some are red.

Also, what does the white triangle with red exclamation mark mean?

I tried to find some info on this, but wasn't able to come up with anything.

Thanks

[tommykjensen]

Hover Your mouse over the icons and You will see ;)

[Marvinspu36]

Thanks!