Using TronLegacy and Nicer Fuel Glow for Space Age at the same time causes the following error.

Error while loading item prototype "empty-encom-energy-cell" (item): Must have a fuel_value when fuel_acceleration_multiplier, fuel_top_speed_multiplier, fuel_emissions_multiplier, or fuel_glow_color are used.
Modifications: TronLegacy-LightCycle › Nicer Fuel Glow for Space Age

Remove line 179 in item.lua fuel_value = "0GJ",

Akasagi if you can confirm this fixes your error I can implement this as I have tested this and it does not cause my mod any issues so im happy to make this change! @Trainman thanks for the tip I did not think of removing the fuel value entry!

It's just an intermediate item, it requires no fuel related parameters.
See vanilla for reference

  {
    type = "item",
    name = "depleted-uranium-fuel-cell",
    icon = "__base__/graphics/icons/depleted-uranium-fuel-cell.png",
    subgroup = "uranium-processing",
    order = "b[uranium-products]-b[depleted-uranium-fuel-cell]",
    inventory_move_sound = item_sounds.nuclear_inventory_move,
    pick_sound = item_sounds.nuclear_inventory_pickup,
    drop_sound = item_sounds.nuclear_inventory_move,
    stack_size = 50,
    weight = 100*kg
  },

I removed the fuel value entry in 1.0.5

Sorry for the delay in confirming. The game started up without any errors.
Thank you for fixing it!