I made all of these in about 30 minutes. Just thought I might give this contest a try. Didn't put too much effort towards detail because they would be professionally rendered by Jagex anyway. Which do you think is best.
1) This is probably the best one.
2) Wtf, a lightbulb.. lol.
3) Don't really think it would be a logo tbh.
4) If they put this on a standard it would look weird: a flag in a flag?