Sparky,

I'm out on a limb with a chainsaw here! [Linked Image]
Keep in mind this is in 'Bills' World' and may prove no resemblance to things in the real world.

Once upon a time...

I would say that what you are losing is Free electrons from your flow. Those are the ones that have the energy to jump from atom to atom as part of your current flow. They're either giving up their 'juice' to the atoms in the filament or decide to leave your group and join the 'Resistance' (I didn't plan that it just happened [Linked Image])

So these Electrons in the Filament are stirring things up and the result of the increased activity is Heat. The amount of light emitted and its' color depend on the temperature of the Filament.

What do you think? [Linked Image]

Bill

Bill