Just in case you haven’t noticed this feature, starting from version 1.11.0 Shapespark supports IES light profiles. IES profile is a measurement of how a particular light source distributes energy depending on the direction, and it allows to achieve more realistic lighting patterns taking into account that some directions are much more illuminated than the others. For example, the below screenshot coming from https://demo.shapespark.com/example-room-ies shows light sources with three nested lobes:
A IES light profile can be configured in the Lights tab of the editor:
Many luminaire producers make the IES profiles for their products available for download. Also, Pixar has granted the IES profiles library used in their RenderMan renderer into the public domain - it’s available here: https://renderman.pixar.com/ies-profiles (thanks, Pixar).