Step #1 in the Expanded Vanilla: Lighting list
Flames are now glow mapped and/or properly illuminated.
If using True Lights and Darkness - Necro Edit, get a compatible version of
Glowing Flames - TrueLightsAndDarkness Tweaks.ESP from this link. It has been patched to make three torches less flickery and reverts five lantern colors back to the "Necro" colors. Credit goes to alvazir for creating the patched plugin.
If you aren't using my CFG Generator, please pay close attention to the load order notes in the README.
Glowing Flames - NoMoreLightlessFlames v1.1.ESP Glowing Flames - TrueLightsAndDarkness Tweaks.ESP