Spherical gradient for spot light I know how to create spherical gradient textures for objects and I also know how to assign image and radial gradient textures to spotlights. I am struggling however with the spherical gradient on spotlights. 

EDIT: This is not a duplicate of the IES light question, I am specifically asking how to do this with a spot light and without an image, which proved possible (see accepted answer).




I want to achieve this, but without an image.



EDIT: this is the nodetree that worked,

thanks to Secrop's answer. Funny thing, I already had Z scaled to 0 for the image texture.
I think you want to make something like fake IES lights. I don't know how to make it with spotlights, but maybe this will help you. So here we go!

Final result:



Steps:


Create simple Circle filled with Ngon or Triangle, or even fill it as you pleased and scale it down to 0.1.
Create this node setup (I'll explain it later):




Most interesting stuff:

Light Falloff.
You can control here light strength and smoothness.

Color Ramp.
This will make gradients as you like. Try adding/deleting/shifting colors and you'll see the magic.

Blackbody.
Real deal here. It's simulating temperature of light. You can delete it and set any color you want.

That's it. You have now fancy fake IES lights with color temperature.

Blend file: