12.2.1 Point light attributes

The attributes supported by Iray for Maya 2.0 are Color and Intensity. All other attributes in the Point Light will be ignored by Iray.
Attributes in the Attribute Edtior of the Maya Point Light
Adjust the color of the emitted light.
Adjust the intensity of the emitted light.
Point Lights in Maya are able to send out light without light decay. This is different in Iray for Maya because in reality light always has a decay over the distance. So it is usually necessary to increase the intensity of the Point Light to see any lighting effect.
Point Lights rendered withIray for Maya 2.0 will only cast hard shadows.