Light Sources, Usage Die

A Light Source depletes according to die rolls and illuminates an area. Each turn, roll. If the result is less than four, use a lower die. If anything less than a four is rolled on a D4, the light source is depleted. Use these steps: D20 -> D12 ->D10 -> D8 -> D6 -> D4 -> depleted.

Designer's Note: For players/referees who don't want to keep a tally, this can simplify things.