As part of the Fine Dying project in Hong Kong, one of my contributions was a 1 lux light. The ashes of the deceased are used and the carbon compressed into a diamond. This diamond resides in a vessel which can be opened switching a light on. 1 lux is one candle light of power. Tasks are not really possible with such a light level thought you can move around safely. The purpose is to encourace contemplation as the light is refracted around the room of the deceased.