What is light's TOTAL illumination radius?

[Ravingdork]

The Vision and Light rules say the following:

See Table: Light Sources and Illumination for the radius that a light source illuminates and how long it lasts. The increased entry indicates an area outside the lit radius in which the light level is increased by one step (from darkness to dim light, for example).

Does the phrase "outside the lit radius" preclude the first radius?

In other words, does a torch's increased radius start 20 feet away from the torch, and extend another 40 feet, providing illumination in a 60-foot radius? Or do the the areas overlap, creating only a 40-foot radius of illumination?

I know there are tons of FAQs and articles and such out there, but they only seem to cover the interaction between overlapping areas of illumination (or lack there of).

If possible, please back up your answer with official sources.

[bbangerter]

If you continue down in the text below the table you come across the following sentence.

Quote:

Areas of dim light include outside at night with a moon in the sky, bright starlight, and the area between 20 and 40 feet from a torch.

So a torch is normal light out to 20'. And 20-40' is dim light (this is the part outside the lit radius, or the 'increased' portion of the light radius).

So the 40' overlaps the 20'.