Add toggleable lighting for Display Entities

I'm making a Minecraft server where a player's items are displayed above them like a name tag, as it looks in the GUI. To do this, I plan to use item display entities to always face the player's POV (billboard: center). Unfortunately, when they are looked at from below, they become darker and it's hard to make out what item/block they are.

I submitted a report thinking it was a bug, but it was quickly resolved as Works As Intended. Assuming it wasn't a mistake, I'd like a property to be added to toggle the lighting of block/item display entities, to have them work as text displays do. In search for a solution I've seen a few other Reddit posts complaining about the lighting of the display entities, so I think it'd benefit datapack/mod creators as a whole.