Halogen light bulbs emit some amount of UV radiation, and some sources consider them dangerous. Here it is written, that UV radiation (of certain types) from a particular halogen bulb was equal to the Sun's at the Earth's surface, if measured 1 cm away from the bulb.
Assuming the bulb emits radiation equally in all directions (it probably does), do I understand correctly that the level should fall proportionally to the distance from the bulb? If there is only small fraction of the Sun's radiation remaining just 1m away, so the bulb is probably safe to use if used in a normal way.
Would this change in any way if the bulb is not a point source but has a filament of say, 1 cm length (assuming "distance" as the distance from the closest part of the filament)?