So, I have no idea why, but the newest version of Biome Mood Lighting is definitely breaking Long Range Delivery Drones (https://mods.factorio.com/mod/Long_Range_Delivery_Drones)

Can be reproduced by running the game with both mods on the newest version. This will produce the following error:
Failed to load mods: __Long_Range_Delivery_Drones__/data-final-fixes.lua:32: attempt to perform arithmetic on field '?' (a nil value)
stack traceback:
Long_Range_Delivery_Drones/data-final-fixes.lua:32: in function 'make_delivery_particle'
Long_Range_Delivery_Drones/data-final-fixes.lua:79: in main chunk

Running with Biome Mood Lighting 0.2.0 instead of 0.2.1 does not produce this error

So, I have no idea why, but the newest version of Biome Mood Lighting is definitely breaking Long Range Delivery Drones (https://mods.factorio.com/mod/Long_Range_Delivery_Drones)

Can be reproduced by running the game with both mods on the newest version. This will produce the following error:
Failed to load mods: __Long_Range_Delivery_Drones__/data-final-fixes.lua:32: attempt to perform arithmetic on field '?' (a nil value)
stack traceback:
__Long_Range_Delivery_Drones__/data-final-fixes.lua:32: in function 'make_delivery_particle'
__Long_Range_Delivery_Drones__/data-final-fixes.lua:79: in main chunk

Running with Biome Mood Lighting 0.2.0 instead of 0.2.1 does not produce this error

EDIT: I did not mean to post this twice. I hit edit, but when i submitted the edit, it showed up as a new message :P

Thank you - Looks like the Long Range Delivery Drones mod assumes that an icon shift is defined in a particular way.
I've just uploaded a new version that should resolve the issue :)