P2: Important PointLight doc says:
By default, a point light has infinite range and does not diminish. However, the fade-off
(and range) can be controlled with the \l {constantFade}, \l {linearFade}, and
\l quadraticFade properties.
...
/*!
* \qmlproperty real PointLight::quadraticFade
*
* This property increases the rate at which the lighting effect dims the light
* in proportion to the inverse square law. The default value is 1.0 meaning the point light
* fade exactly follows the inverse square law i.e. when distance to an object doubles the
* light intensity decreases to 1/4th.
*
*/
The default point light has quadratic fade of 1.0, though doc also says that it has infinite range and doesn't diminish. I think default shouldn't be quadratic fade, as that is pretty aggressive, resulting in very dim light.