I'm running a roll20 4th edition game and, having recently purchased dynamic lighting and started designing the first dungeon that the players will explore, run almost immediately into a question - that is, lighting. How much light does a regular, mundane, nonmagical lantern emit?
A mundane lantern will shed bright light in a 10 square radius, as per page 167 of the Rules Compendium:
Radius: 10 squares
Duration: 8 hours per pint of oil