Flaming arrows and mobs on fire does not produce light

You are right, this would be very nice. But currently this works as intended. There is no dynamic lighting in Minecraft. This is not a bug.

Yes. Only blocks and the sun can give off light.

although not a bug, i consider a quirk. i think it is a MISSING feature, as it doesn't make sense that i just lit myself on fire and do not emit any light.

For feature suggestions/changes please use the MineCraft Forums: Suggestions.

Will do.

Don't destroy tickets.