All lighting manufacturers, for each light fitting they offer, provide an IES file.
These exactly capture the light that is emitted in every direction.
You will need to download a selection of IES files and store them in a folder on your computer. Use the LightUp QueryTool to click on a PointLightSource and browse to where you stored the IES files, and choose the style you like. A video tutorial showing using IES files is available here.
These Mac Finder and Windows Explorer enable viewing a small thumbnail of IES files without opening them that appears next to the file name.
They are FREE of charge.